awesome-dotnet

.NET toolkit

A collection of curated .NET libraries, tools, and frameworks for software development

A collection of awesome .NET libraries, tools, frameworks and software

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Table of Contents / Algorithms and Data structures

OneOf 3,561 5 months ago OneOf provides discriminated unions for C# with exhaustive compile time matching
Algorithmia 536 over 2 years ago Algorithm and data-structure library for .NET 3.5 and up. Algorithmia contains sophisticated algorithms and data-structures like graphs, priority queues, command, undo-redo and more
C# Algorithms 5,971 over 1 year ago A C# plug-and-play class-library project of standard Data Structures and Algorithms. It contains 35+ Data Structures and 30+ Algorithms designed as Object-Oriented isolated components
Towel 729 about 1 year ago data structures, algorithms, mathematics, metadata, extensions, console, measurements, and other useful stuff
Akade.IndexedSet 64 about 1 month ago A convenient data structure supporting efficient in-memory indexing and querying, including range queries and fuzzy string matching

Table of Contents / API

FastEndpoints 4,755 about 1 month ago High-performance middleground between classic ASP.NET Core API controllers and Minimal APIs. Using a REPR ( ) pattern, this library eliminates the boilerplate and monolithic feel of controllers by improving colocation of code
Telegram.Bot 3,262 about 1 month ago .NET Client for
TLSharp 1,003 about 3 years ago It's a perfect fit for any developer who would like to send data directly to Telegram users or write own custom Telegram client
WTelegramClient 1,023 about 1 month ago Automate a user account on Telegram, using the latest version of
NancyFx 7,149 almost 4 years ago Lightweight, low-ceremony, framework for building HTTP-based services on .NET and Mono
ASP.NET Web API Framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices
Breeze API framework enabling rich data access by using the OData 3 protocol. Client libraries available for JavaScript and C#
Mobius: C# API for Spark 941 12 months ago Mobius adds C# language binding to Apache Spark, enabling the implementation of Spark driver code and data processing operations in C#
ServiceStack 5,416 about 1 month ago Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
Nelibur 128 over 6 years ago Nelibur is message based web service framework on the pure WCF. Nelibur simplifies creating high-performance and message-based web services and you certainly have all the power of the WCF
WebAPI Contrib 767 about 8 years ago Collection of open source projects to help improve your work with ASP.NET Web API
Xamarin.Essentials Xamarin.Essentials provides developers with cross-platform APIs for their mobile applications
FFImageLoading - Fast & Furious Image Loading 1,416 almost 2 years ago This Library to load images quickly & easily on Xamarin.iOS, Xamarin.Android, Xamarin.Forms, Xamarin.Mac / Xamarin.Tizen and Windows (UWP, WinRT)
Ocelot 8,421 about 1 month ago .NET core API Gateway
CommandQuery 107 5 months ago Command Query Separation for 🌐ASP.NET Core ⚡AWS Lambda ⚡Azure Functions ⚡Google Cloud Functions 🌐ASP.NET Web API 2

Table of Contents / Application Frameworks

.NET Boxed Framework 725 about 2 months ago .NET Core Extensions and Helper NuGet packages
ASP.NET Boilerplate 11,849 about 2 months ago A starting point for new modern ASP.NET MVC web applications with best practices and most popular tools
ABP 13,038 about 1 month ago The next generation of the ASP.NET Boilerplate web application framework
Orleans 10,167 about 1 month ago Orleans is a framework that provides a straight-forward approach to building distributed high-scale computing applications, without the need to learn and apply complex concurrency or other scaling patterns
Newbe.Claptrap 215 over 1 year ago This is a set of server-side development frameworks with reactive, event sourcing and Actor pattern as basic theories. On top of this, developers can develop "distributed", "scale out", and "easy to test" application more simply
CoreFX 17,650 almost 2 years ago The corefx repo contains the library implementation (called "CoreFX") for .NET Core. It includes System.Collections, System.IO, System.Xml and many other components
CSLA .NET 1,273 about 1 month ago business layer development framework
Mono 11,160 5 months ago Open source ECMA CLI, C#, F#, VB and .NET implementation
Mono-Addins 163 11 months ago Mono.Addins is a generic framework for creating extensible applications, and for creating add-ins which extend those applications
peasy 513 12 months ago Peasy is a middle tier framework that offers an easy to use and flexible rules engine and was designed to address common challenges such as concurrency handling, transactional support, fault tolerance, threading, scalability, async and multiple client support, and easy testability, all without a huge learning curve!
Plastic 59 7 months ago Plastic provides encapsulation of things like Domain, Application Rules, Business Rules or Business Logic in Application. For this, Command pattern is used
Signals 60 2 months ago Signals is a .NET5 based framework which focuses on increasing the quality and productivity within development teams by providing them with tools, aspects and processes
Spring.Net 858 about 2 months ago Spring.NET is an open source application framework that makes building enterprise .NET applications easier
DotNetty 4,105 6 months ago DotNetty is a port of Netty, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients
AspectCore Framework 1,700 about 2 months ago AspectCore Framework is an Aspect-Oriented Programming based cross platform framework for .NET Core and .NET Framework. Core support for aspect-interceptor,dependency injection integration , web applications , data validation , and more
HopFramework 49 about 2 years ago HopFramework is a framework to create projects easily applying Domain Driven Design and a lot of patterns to delivery a better solution
Fusion 1,863 11 months ago .NET Core and Blazor library that attempts to dramatically improve the way we implement real-time and high-load services by introducing a novel kind of "computed observables" - immutable, thread-safe, and most importantly, almost invisible for developers
silky 276 5 months ago The Silky framework is designed to help developers quickly build a microservice development framework through simple code and configuration under the .net platform

Table of Contents / Application Templates

.NET Boxed Templates 3,415 about 2 months ago .NET project templates with batteries included, providing the minimum amount of code required to get you going faster
ASP.NET Core Starter Kit 1,161 about 2 years ago backend: .NET Core, EF Core, C#; frontend: Babel, Webpack, React, CSS Modules
ProjectScaffold 517 over 1 year ago A prototypical .NET solution recommended by the F# Foundation---includes file system setup, Paket for dependencies and FAKE for build/test automation. By default, build process also compiles documentation and generates NuGet packages
Serene 2,609 about 1 month ago Serenity is an ASP.NET MVC application platform designed to simplify and shorten development of data-centric business applications with a service-based architecture. Serene is a starter template to build Serenity applications
Side-Waffle 657 almost 5 years ago Large collection of useful templates for Web and Desktop development
Template10 1,415 8 months ago Windows 10 templates with design patterns
Nucleus 356 over 1 year ago Vue startup application template that uses ASP.NET Core API layered architecture at the back-end and JWT based authentication
JHipster.NET 315 about 2 months ago JHipster blueprint for replace orginal SpringBoot Backend by asp.net core. The main goal generator of jhipster is showcases best practices of modern web development in java. So the goal of the project is to do the same in .net. The Frontend can be generated with angular or react and soon with blazor

Table of Contents / Artificial Intelligence

AIMLBot (Program#) A small, fast, standards-compliant yet easily customizable implementation of an AIML (Artificial Intelligence Markup Language) based chatter bot in C#
SIML Synthetic Intelligence Markup Language, a next generation Chatbot & Digital Assistant Language
Mpt-Instruct-DotNet-S 18 over 1 year ago LLM that can generate and explain C# code (and its C# wrapper to run on consumer CPU with 5GB ram+, contains Console and Blazor sample projects)
LLamaSharp 2,750 about 1 month ago C#/.NET Binding of llama.cpp, run LLaMA/GPT model using C# without having to compile lama.cpp

Table of Contents / Assembly Manipulation

Fody 4,382 about 2 months ago Extensible tool for weaving .NET assemblies
ILRepack 1,192 about 1 month ago Open-source alternative to ILMerge
Mono.Cecil 2,775 4 months ago Cecil is a library to generate and inspect programs and libraries in the ECMA CIL form

Table of Contents / Assets

Cassette 534 over 2 years ago Manages .NET web application assets (scripts, css and templates)
NodeAssets 23 over 2 years ago Asset Manager for .NET that has live CSS updates using SignalR and can optionally leverage Node.js compilers
Bundle Transformer 130 about 1 month ago Modular extension for . Its modules supports LESS, Sass, CoffeeScript, TypeScript, Mustache, Handlebars, Autoprefixer along with a bunch of different JS and CSS minifiers
Bundler 263 over 7 years ago Compile & Minify Less/Sass/Stylus/Css/JS/CoffeeScript/LiveScript files. Integrates with MVC and ServiceStack
SquishIt 459 over 1 year ago Lets you bundle some CSS and JavaScript

Table of Contents / Authentication and Authorization

Abblix OIDC Server 40 about 2 months ago A fully certified OpenID Connect server library for .NET by the OpenID Foundation, providing comprehensive support for OAuth2 and OpenID Connect across all profiles
ASP.NET Identity 1,962 about 6 years ago New membership system for ASP.NET applications
ASP.NET SAML 373 about 2 months ago SAML authentication support for ASP.NET apps
Logibit Hawk 36 over 6 years ago A F# authentication library
IdentityModel Helper library for identity & access control in .NET 4.5 and MVC4/Web API
IdentityServer Extensible OAuth2 and OpenID Connect provider framework
OAuth 78 over 4 years ago A very lightweight library for generating OAuth 1.0a signatures written in C#
Stuntman Stuntman is a library for impersonating users during development leveraging .NET Claims Identity
openiddict 4,484 about 1 month ago Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET
Topaz A fine-grained authorization system with .NET SDK
Enforcer Write fine grained authorization policy in easy-to-read language, and have it compiled to native .NET code
SAML IdentityServer Add SAML 2P support to your Duende IdentityServer
SAML OpenIddict Add SAML 2P support to your OpenIddict

Table of Contents / Blazor

BootstrapBlazor 2,805 about 1 month ago A set of enterprise-class UI components based on Bootstrap and Blazor
ant-design-blazor 5,858 about 1 month ago A set of enterprise-class UI components based on Ant Design and Blazor WebAssembly
MASA.Blazor 1,209 about 1 month ago A set of enterprise-class UI components based on Material Design and Blazor WebAssembly
Megabit.Blazorise 3,328 about 1 month ago Blazorise is a component library built on top of Blazor and CSS frameworks like Bootstrap, Bulma and Material. Very easy to use
blazork8s 173 about 2 months ago k8s management ui in blazor and .NET Core
MudBlazor 8,275 about 1 month ago A Material Design framework for Blazor, allowing .NET developers to quickly build web apps, with extensive documentation and examples

Table of Contents / Blockchain

Nethermind 1,288 about 1 month ago full Ethereum client in .NET Core

Table of Contents / Build Automation

Psake 1,566 3 months ago .NET-based build automation tool written in PowerShell
FAKE 1,291 2 months ago F# Make, a cross-platform build automation system
Invoke-Build 659 about 2 months ago PowerShell build and test automation tool inspired by Psake
MSBuild 5,256 about 1 month ago The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio
Cake 3,928 about 2 months ago Cake (C# Make) is a cross-platform build automation system with a C# DSL
Nake 238 7 months ago Magic script-based C# task runner
Nuke 3,116 about 1 month ago Cross-platform build automation system
FlubuCore 909 10 months ago A cross platform build and deployment automation system for building projects and executing deployment scripts using C# code
ModularPipelines 324 about 1 month ago Write your pipelines in C#

Table of Contents / Business Intelligence

FastReport 2,740 3 months ago The open source report generator for .NET Core 2.x/.Net Framework 4.x. FastReport can be used in ASP.NET MVC, Web API applications
NReco PivotData in-memory data aggregation/OLAP library, pivot tables generation (render to HTML, exports), ASP.NET pivot builder control

Table of Contents / Caching

CacheCow 857 7 months ago An ASP.NET Web API HTTP caching implementation both on client and server
Akavache 2,459 about 1 month ago An asynchronous, persistent key-value store
EasyCaching 1,976 3 months ago A caching library that contains basic and some advanced usages of caching which can help handle caching more easier!
CacheManager 2,350 5 months ago A common interface and abstraction layer for caching
FastCache 138 2 months ago 10X faster alternative to for .NET
Foundatio 1,992 about 1 month ago A common interface with in memory, Redis and hybrid implementations
Cashew 83 almost 5 years ago a .NET library for caching responses easily with an through an API that is simple and elegant yet powerful
Cache Tower 614 about 2 months ago An efficient multi-layered caching system for .NET (In-Memory, Redis, Database, File etc)
FusionCache 1,976 about 1 month ago An easy to use, high performance and robust cache with an optional distributed 2nd layer and some advanced features, like a fail-safe mechanism and advanced timeouts management
LazyCache 1,722 8 months ago A simple, developer friendly, in-memory thread-safe caching service. It leverages Microsoft.Extensions.Caching and Lazy to provide performance and reliability in heavy load scenarios
BitFaster.Caching 487 about 2 months ago Thread-safe in-memory caches optimized for very high concurrent throughput, near optimal hit rate and low latency

Table of Contents / Calendar

iCal.NET 799 about 1 month ago iCal.NET is an iCalendar (RFC 5545) class library for .NET aimed at providing RFC 5545 compliance, while providing full compatibility with popular calendaring applications and libraries

Chat

Stream 64 6 months ago Official .NET API client for Stream Chat, a service for building chat applications

Chat / CLI

Appccelerate - Command Line Parser A command-line parser with fluent definition syntax, different argument types, required and optional arguments, value restrictions, aliases, type conversion and semi-automatic usage help message composition
Argu 460 about 1 month ago Declarative CLI argument & XML configuration parser for F# applications
CliFx 1,514 about 2 months ago Declarative framework for building command line interfaces
Typin 244 about 2 years ago Simple to use declarative framework for interactive CLI applications and command line tools (direct mode) that has its roots in CliFx
clipr 89 over 5 years ago A CLI library inspired by Python's argparse that transforms a command line into a strongly-typed object. It supports custom argument types, automated (and localized) help generation, and a variety of ways to store parsed arguments
CliWrap 4,446 about 1 month ago Wrapper for command line interfaces
Colorful.Console 1,312 8 months ago Colorful console output
CommandDotNet 582 about 1 month ago Model your console app using C# in a composable manner. Define commands with methods. Define subcommands with properties or nested classes. Extensible parsing and command execution
Command Line Parser 4,601 11 months ago The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command-line arguments and related tasks
CommandLineUtils 2,218 3 months ago This is a fork of Microsoft.Extensions.CommandLineUtils, which is no longer under active development
CsConsoleFormat 367 over 2 years ago .NET C# library for advanced formatting of console output
Docopt 356 6 months ago Command-line interface description language that will make you smile
EntryPoint 137 over 5 years ago Composable CLI Argument Parser for .NET Core & .NET Framework 4.5+
Fluent Command Line Parser 533 over 5 years ago A simple, strongly typed .NET C# command-line parser library using a fluent easy to use interface
JustCli 29 almost 4 years ago That’s just a quick way to create your own command line tool
Gui.cs 9,778 about 1 month ago Terminal UI toolkit for .NET
Power Args 569 about 2 months ago PowerArgs converts command-line arguments into .NET objects that are easy to program against. It also provides a ton of optional capabilities such as argument validation, auto generated usage, tab completion, and plenty of extensibility
ReadLine 810 over 3 years ago A GNU-Readline like library for .NET/.NET Core
RunInfoBuilder 43 almost 6 years ago A unique command line parser, utilizing object trees for commands
SharpNetSH 75 over 1 year ago A simple netsh library for C#
spectre.console 9,591 about 1 month ago A library that makes it easier to create beautiful console applications

Chat / CLR

Runtime 15,518 about 1 month ago Mono and CoreCLR .NET runtimes, as well as the standard library and some higher level components like and

Chat / CMS

FluentCMS 290 about 1 month ago FluentCMS is open source AI Driven ASP.NET Core Blazor Content Management System (CMS)
Composite C1 250 about 2 months ago A web CMS that focus on UX and adaptability
mojoPortal 200 about 1 month ago MojoPortal is an extensible, cross database, mobile friendly, web content management system (CMS) and web application framework written in C# ASP.NET
N2CMS 364 almost 3 years ago Open source, lightweight, code-first CMS able to seamlessly integrate into any MVC project
Orchard 2,380 about 1 month ago Free, open source, community-focused project aimed at delivering applications and reusable components on the ASP.NET platform
Piranha CMS 2,038 about 1 month ago Piranha is the fun, fast and lightweight .NET framework for developing cms-based web applications with an extra bite. It's built on ASP.NET MVC and Web Pages and is fully compatible with both Visual Studio and WebMatrix
Umbraco 4,555 about 1 month ago Umbraco is a free open source Content Management System built on the ASP.NET platform
DotNetNuke DNN Platform is our free, open source web CMS and the foundation of every professional DNN solution. Over 750,000 organizations worldwide have built websites powered by the DNN Platform
BlogEngine.NET 963 over 1 year ago Simple but full featured ASP.NET blog
Squidex 2,285 about 1 month ago Open source headless CMS and content management hub
fluent-cms 115 about 1 month ago RESTful CRUD (Create, Read, Update, Delete) APIs, Admin Panel web pages,a GraphQL-style query designer and a WYSIWYG web page designer, all fully configurable without writing code

Chat / Code Analysis and Metrics

.NET Compiler Platform ("Roslyn") Analyzers 1,598 about 1 month ago A number of Roslyn diagnostic analyzers initially developed to help flesh out the design and implementation of the static analysis APIs
PVS-Studio PVS-Studio is a static analyzer on guard of code quality, security (SAST), and code safety
NDepend is a Visual Studio and VS Team Services extension that estimates your .NET code quality and Technical-Debt, that lets create code rules with C# LINQ syntax, visualize code structure and focus on changes and evolution
App.Metrics 2,221 8 months ago App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application and reports it's health. See the for me details
CodeMaid Visual studio extension to cleanup, dig through and simplify C#, C++, F#, VB, PHP, JSON, XAML, XML, ASP, HTML, CSS, LESS, SCSS, JavaScript and TypeScript coding
StyleCop StyleCop analyzes C# source code to enforce a set of style and consistency rules
Gendarme 78 almost 14 years ago Extensible rule-based tool to find problems in .NET applications and libraries
Metrics-Net 640 almost 6 years ago Capturing CLR and application-level metrics. So you know what's going on
AspNet.Metrics 9 almost 8 years ago Capturing CLR, application-level web request metrics. Middleware and extensions using Metrics-Net
BenchmarkDotNet 10,654 about 1 month ago Powerful .NET library for benchmarking
Bencher Suite of continuous benchmarking tools designed to catch performance regressions in CI
Codinion Enhanced syntax highlighting for C# and some other "Visual" features
NsDepCop 200 4 months ago Static code analysis tool to enforce namespace dependency rules in C# projects
WebBen 11 12 months ago Is a tool for benchmarking your Hypertext Transfer Protocol (HTTP) server

Chat / Code Snippets

.NET Fiddle Write, compile and run C#, F# and VB code in the browser. The .Net equivalent of JSFiddle
Sharplab Run C# code using different branches and versions of Roslyn, see the IL that was produced and examine the JIT's output
Entity Framework Playground Examine the generated SQL for migrations and queries by writing and queries using it in the browser. Learn by example, compare different versions of Entity Framework and providers such as MS SQL, PostgreSql and Sqlite

Chat / Compilers, Transpilers and Languages

ClojureCLR 1,570 about 1 month ago A port of Clojure to the CLR, part of the Clojure project
F# 2,168 about 2 years ago The F# compiler, core library and tools - a functional programming language for safer, faster, better code writing
Hybridizer CIL (C#, VB.Net, F#) to CUDA compiler
IronScheme 384 about 2 months ago R6RS Scheme compiler, runtime and many standard libraries
JSIL 1,733 almost 7 years ago CIL to JavaScript Compiler
Mond 369 about 1 month ago A dynamically typed scripting language written in C# with a REPL, debugger, and simple embedding API
Mono-basic 109 almost 4 years ago Visual Basic Compiler and Runtime
Nemerle 622 over 2 years ago Nemerle is a high-level statically-typed programming language for the .NET platform. It offers functional, object-oriented and imperative features. It has a simple C#-like syntax and a powerful meta-programming system
Netjs 965 over 5 years ago .NET to TypeScript and JavaScript compiler. Portable Class Libraries work great for this. You can even pass EXEs
P 3,051 about 1 month ago P is a language for asynchronous event-driven programming
PeachPie 2,381 about 2 months ago PeachPie is a PHP compiler and runtime for .NET and .NET Core, which allows entire PHP applications to run on the modern, secure and performant .NET and .NET Core platforms
Roslyn 19,145 about 1 month ago The .NET Compiler Platform ("Roslyn") provides open-source C# and Visual Basic compilers with rich code analysis APIs. It enables building code analysis tools with the same APIs that are used by Visual Studio
Testura.Code 297 8 months ago Wrapper around the Roslyn API and used for generation, saving and compiling C# code. It provides methods and helpers to generate classes, methods, statements and expressions
VisualFSharp 3,948 about 1 month ago The Visual F# compiler and tools
Fable 2,928 about 2 months ago F# to JavaScript Compiler
LinqOptimizer 477 over 5 years ago An automatic query optimizer-compiler for Sequential and Parallel LINQ
Roslyn-linq-rewrite 716 almost 5 years ago Compiles C# code by first rewriting the syntax trees of LINQ expressions using plain procedural code, minimizing allocations and dynamic dispatch
Iron python 1,075 12 months ago A python 2 implementation that is integrated with the dot net framework
Amplifier.NET 177 about 2 years ago Write and compile your own kernel function using C# and Amplifier will take care of running it on your favorite hardware. Amplifier allows .NET developers to easily run complex applications with intensive mathematical computation on Intel CPU/GPU, NVIDIA, AMD without writing any additional C kernel code
IKVM A Java Virtual Machine and Bytecode-to-IL Converter for .NET. Execute compiled Java code (bytecode) on .NET Framework or .NET Core
Lib.Harmony 5,351 2 months ago Rewrite mono and C# methods at the runtime, Either write a method that will be executed, or edit the code of the method in IL, mainly used for game modding
dotnet-repl 746 12 months ago C# REPL (read-eval-print loop)

Chat / Compression

SharpCompress 2,298 3 months ago SharpCompress is a compression library for .NET/Mono/Silverlight/WP7 that can unrar, un7zip, unzip, untar unbzip2 and ungzip with forward-only reading and file random access APIs. Write support for zip/tar/bzip2/gzip are implemented
DotNetZip.Semverd 549 8 months ago An open-source project that delivers a .NET library for handling ZIP files, and some associated tools. (fork of )
SharpZipLib a Zip, GZip, Tar and BZip2 library written entirely in C# for the .NET platform
Snappy for Windows Snappy compression library for .NET baked on P/Invoke
Snappy.Sharp 144 over 7 years ago An implementation of Google's Snappy compression algorithm in C#

Chat / Configuration

AgileConfig 1,520 about 1 month ago AgileConfig is a lightweight configuration center that helps you manage all your application's configurations through website

Chat / Continuous Integration

TeamCity Ready to work, extensible and developer-friendly build server — out of the box
MyGet Continuous Integration and Deployment, Hosted Package Repository for NuGet, NPM, Bower and VSIX
AppVeyor .NET Continuous Integration and Deployment as a service

Chat / Cryptography

BouncyCastle Together with the .Net System.Security.Cryptography, the reference implementation for cryptographic algorithms on the CLR
HashLib HashLib is a collection of nearly all hash algorithms you've ever seen, it supports almost everything and is very easy to use
libsodium-net libsodium for .NET - A secure cryptographic library
NaCl.Core 72 5 months ago A managed-only cryptography library for .NET which provides modern cryptographic primitives
Paseto.Core 105 4 months ago A Paseto (Platform-Agnostic Security Tokens) implementation for .NET
Pkcs11Interop 264 2 months ago Managed .NET wrapper for unmanaged PKCS#11 libraries that provide access to the cryptographic hardware
StreamCryptor 131 almost 8 years ago Stream encryption & decryption with libsodium and protobuf
SecurityDriven.Inferno 582 about 2 months ago .NET crypto library. Professionally audited
CryptoNet 104 about 2 months ago .NET simple crypto library. Native c#

Chat / Cloud Storage

Foundatio 1,992 about 1 month ago Cloud Storage library with AWS, Azure and many other providers supported
FluentStorage 302 2 months ago A polycloud .NET cloud storage abstraction layer originally known as Storage.Net. Provides a generic interface for Blob storage (AWS S3, GCP, FTP, SFTP, Azure Blob/File/Event Hub/Data Lake) and Messaging (AWS SQS, Azure Queue/ServiceBus)
Stowage 169 about 2 months ago Bloat-free zero dependency .NET cloud storage kit that supports at minimum THE major cloud providers
Cloud Storage 68 4 months ago :- This library provides a universal interface for accessing and manipulating data in different cloud blob storage providers (Azure Storage, AWS S3, Google Cloud Storage. It makes it easy to switch between providers or to use multiple providers simultaneously, without having to learn and use multiple APIs

Chat / Database

SliccDB 134 almost 2 years ago Lightweight Embedded (In-Memory) Graph Database for .net
RocksDB 167 3 months ago C# binding for Facebook's RocksDB Key-Value store + native builds for Windows, macOS and Linux
BrightstarDb 458 over 1 year ago BrightstarDB is a native .NET RDF triple store
DBreeze 533 3 months ago DBreeze Database is an open-source embedded Key-Value store
Event Store 5,336 about 1 month ago The open-source, functional database with Complex Event Processing in JavaScript
LiteDB 8,678 about 1 month ago A .NET NoSQL Document Store in a single data file -
RavenDB 3,619 about 1 month ago A LINQ-enabled document database for .NET
Marten 2,886 about 1 month ago PostgreSQL as a document database and event store for .NET applications
Realm Xamarin 1,259 4 months ago A fast, easy-to-use alternative to SQLite & ORMs -
Streamstone 395 7 months ago Event store for Azure Table Storage
StringDB 71 almost 2 years ago StringDB is a modular, key/value pair archival DB designed to consume tiny amounts of ram & produce tiny databases
Ignite 4,834 about 1 month ago Distributed in-memory platform: document database with SQL and LINQ support; distributed computations; distributed services and events
Yessql 1,230 about 1 month ago A .NET document database working on any RDBMS
JsonFlatFileDataStore 445 about 1 month ago Simple JSON flat file data store with support for typed and dynamic data
Db4o-gpl 30 almost 2 years ago Object-oriented database, embedded and remote connections supported
ZoneTree 378 2 months ago Persistent, high-performance, transactional, and ACID-compliant ordered key-value database for .NET

Chat / Database Drivers

DuckDB.NET 458 about 1 month ago .NET data provider for DuckDB
MySQL Connector Connector/Net is a fully-managed ADO.NET driver for MySQL
Npgsql 3,354 about 1 month ago .NET data provider for PostgreSQL
MongoDB 3,155 about 1 month ago Official MongoDB C# driver
RethinkDb.Driver 384 about 4 years ago A RethinkDB database driver in C# striving for 100% ReQL API compatibility and completeness
ServiceStack Redis 2,289 almost 3 years ago .NET's leading C# Redis client
StackExchange Redis 5,930 about 1 month ago General purpose Redis client from StackExchange
Cassandra 641 about 2 months ago DataStax .NET driver for Apache Cassandra
Couchbase 276 about 1 month ago Official Couchbase .NET client library, based on the Enyim memcached client
Firebird.NET The .NET Data provider is written in C# and provides a high-performance, native implementation of the Firebird API

Chat / Datetime

NodaTime 2,810 2 months ago Noda Time is an alternative date and time API for .NET. It helps you to think about your data more clearly, and express operations on that data more precisely
DateTimeExtensions 800 about 2 months ago Common Date Time operations on the form of extensions to , including holidays and working days calculations on several culture locales
Exceptionless.DateTimeExtensions 240 6 months ago DateTimeRange, Business Day and various , , extension methods

Chat / Decompilation

dnSpy 26,802 about 4 years ago open-source .NET assembly browser, editor, decompiler and debugger
dnSpyEx 7,104 about 1 month ago Unofficial revival of dnSpy
ILSpy ILSpy is the open-source .NET assembly browser and decompiler
JustDecompile Engine The decompilation engine of
dotPeek Free-of-charge standalone tool based on ReSharper's bundled decompiler. It can reliably decompile any .NET assembly into equivalent C# or IL code. It can create Visual Studio solutions based on the original binary files in a straight-forward way

Chat / Deployment

Unfold 135 over 8 years ago PowerShell-based deployment solution for .NET web applications
DbUp 2,367 about 1 month ago .NET library that helps you to deploy changes to SQL Server databases. It tracks which SQL scripts have been run already, and runs the change scripts that are needed to get your database up to date
Octo Pack 182 over 4 years ago Used to build NuGet packages of your application for deployment using tools such as Octopus Deploy
yuniql 416 6 months ago Free and open source schema versioning and migration tool made with .NET Core. Run migrations with plain SQL, arrange versions in ordinary folders and seed your data from CSV via stand-alone CLI (no CLR needed), Azure Pipelines, Docker or ASP.NET Core code

Chat / DirectX

Vortice.Windows 1,024 about 2 months ago Cross platform .NET standard libraries for DirectX, WIC, Direct2D1, XInput, XAudio and X3DAudio

Chat / Distributed Computing

.NEXT Raft 1,659 about 1 month ago Raft implementation for .NET and ASP.NET Core that allows to build clustered microservices powered by distributed consensus and replication
Orleans 10,167 about 1 month ago Orleans is a framework that provides a straight-forward approach to building distributed high-scale computing applications, without the need to learn and apply complex concurrency or other scaling patterns. It was created by Microsoft Research
Orleankka 495 7 months ago Orleankka is a functional API for Microsoft Orleans framework. It is highly suitable for scenarios where having composable, uniform communication interface is preferable, such as: CQRS, event-sourcing, re-routing, FSM, etc. Additional API available for F# called Orleankka.FSharp
Akka.net 4,737 about 1 month ago Akka.NET is a port of the popular Java/Scala framework Akka to .NET. This is a community-driven port and is not affiliated with Typesafe who makes the original Java/Scala version
Zebus 305 about 1 year ago Zebus is a lightweight, highly versatile, peer-to-peer service bus, built with CQRS principles in mind. It allows applications to communicate with each other in a fast and easy manner. Most of the complexity is hidden in the library and you can focus on writing code that matters to you, not debugging messaging code. A very fundamental base for any distributed application
FsShelter 1 about 6 years ago F# library for authoring components and topologies. Offering high-level abstractions for distributed and fault-tolerant event stream processing
MBrace Integrated Data Scripting for the Cloud
protoactor-dotnet 1,742 about 2 months ago Proto Actor - Ultra fast distributed actors for Golang and C#

Chat / DLR

cmd 357 over 4 years ago C# library to run external programs in a simpler way. Demonstration of "dynamic" features of C#

Chat / Documentation

Sandcastle 2,203 2 months ago Sandcastle Help File Builder similar to NDoc
SourceBrowser 1,086 about 1 month ago Source browser website generator that powers
Swashbuckle 3,071 almost 3 years ago Seamlessly adds a Swagger to Web API projects
F# Formatting Tools for documenting F# and C# projects from F# script files, Markdown documents and inline XML or Markdown comments
DocFX 4,096 about 1 month ago Tools for building and publishing API documentation for .NET projects
DocNet 250 about 1 year ago Your friendly static documentation generator, using markdown files to build the content

Chat / E-Commerce and Payments

NopCommerce 9,367 about 1 month ago nopCommerce. Free open-source e-commerce shopping cart (ASP.NET Core)
ServiceStack.Stripe 194 almost 3 years ago Typed .NET clients for stripe.com REST APIs
SmartStoreNET 1,238 about 1 month ago Free ASP.NET Core MVC e-commerce Shopping Cart Solution
Stripe.Net 1,374 about 1 month ago Stripe.net is a full service .NET API for
Virto Commerce 1,237 about 1 month ago Virto Commerce is the second generation release and is the only enterprise level e-commerce product fully available under Open Source license. Virto Commerce is based on .NET 4.5 with extensive use of MVC, IoC, EF, Azure, AngularJS and many other cutting edge technologies. It can be deployed in Microsoft Cloud (Azure), Amazon Web Services (AWS) and on-premise
SimplCommerce 4,232 6 months ago Super simple ecommerce system built on .NET Core. Simple to use and easy to customize. Thanks to .NET Core, you can run the SimplCommerce on Windows, Linux. With various RDBMS: Microsoft SQL Server, PostgreSQL, MySQL
GrandNode 1,116 about 1 month ago Headless, multi-vendor, multi-tenant, the most advanced open source e-commerce platform based on .NET Core 5.0 and MongoDB
Adyen 109 about 1 month ago The official Adyen Payment API Library for .NET

Chat / Emulators

Blzhawk 2,219 about 1 month ago BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores
Ryujinx Experimental Nintendo Switch Emulator written in C#

Chat / Environment Management

Dotnet CLI 3,487 almost 2 years ago The cross-platform .NET Core command-line toolchain utility

Chat / ETL

Cinchoo ETL 806 about 2 months ago ETL Framework for .NET (Read / Write CSV, Flat, Xml, JSON, Key-Value formatted files)
Reactive ETL Reactive ETL is a rewrite of Rhino ETL using the reactive extensions for .NET

Chat / Event aggregator and messenger

Mediator.Net 373 9 months ago A simple mediator for .NET for sending command, publishing event and request response with pipelines supported
MediatR 11,242 3 months ago Simple, unambitious mediator implementation in .NET
Rx Event Aggregator Super-simple Reactive-Extension code from Reactive.EventAggregator
TinyMessenger 285 about 7 years ago A lightweight event aggregator/messenger for loosely coupled communication
Xer.Cqrs 101 over 6 years ago A simple library for creating applications based on the CQRS pattern with support for attribute routing and hosted handlers. Developed in C# targeting .NET Standard 1.0
FluentMediator 194 almost 5 years ago FluentMediator is an unobtrusive library that allows developers to build custom pipelines for Commands, Queries and Events
EventFlow 2,394 about 1 month ago EventFlow is an Async/await first CQRS and Event Sourcing DDD framework for .NET

Chat / Exceptions

Exceptionless 560 3 months ago Exceptionless .NET Client

Chat / Extensions

ExtensionMethods.Net Site with collection of extension methods
Z.ExtensionMethods 1,601 10 months ago Over a 1000 useful extension methods

Chat / Feature management

Microsoft.FeatureManagement 1,062 about 1 month ago This library provides a way to develop and expose application functionality based on feature flags. It enables scenarios like new feature rollouts and A/B testing for experimentation purposes. It also provides integration with common .NET coding patterns and ASP.NET Core

Chat / Functional programming

Curryfy 69 over 1 year ago Provides strongly typed extensions methods for C# delegates to take advantages of functional programming techniques, like currying and partial application
language-ext 6,553 about 2 months ago This library uses and abuses the features of C# 6+ to provide a functional 'Base class library', that, if you squint, can look like extensions to the language itself. It also includes an 'Erlang like' process system (actors) that can optionally persist messages and state to Redis (note you can use it without Redis for in-app messaging). The process system additionally supports Rx streams of messages and state allowing for a complete system of reactive events and message dispatch
Optional 905 over 1 year ago A robust option type for C#
JFlepp.Maybe 4 almost 5 years ago A Maybe type for C#, aimed as an idiomatic port of the option type in F# to C#
Optuple 29 over 5 years ago .NET Standard Library for giving Option-like semantics in a non-obtrusive way; this is, there is no new option type dependency for a library or its users
MoreLinq 3,706 4 months ago Provides extra methods to LINQ to Objects

Chat / Game

MonoGame 11,642 about 1 month ago One framework for creating powerful cross-platform games
FNA 2,661 about 1 month ago FNA is an XNA4 reimplementation that focuses solely on developing a fully accurate XNA4 runtime for the desktop
CocosSharp 493 almost 5 years ago CocosSharp is a C# implementation of the Cocos2D and Cocos3D APIs that runs on any platform where MonoGame runs
Duality 1,411 4 months ago Duality is a 2D game development framework. Focused on modularity, comes with a visual editor
Stride Game Engine Stride Game Engine is a 2D/3D cross-platform game engine featuring a scene editor, particles, physically based rendering (PBR), scripting, and much more
Wave Engine Wave engine is a free C# component-based modern game engine which allows you to create cross-platform games supporting Kinect, Oculus Rift, Vuforia, Cardboard, Leap Motion and much more
UrhoSharp 464 over 2 years ago UrhoSharp is a C# implementation of the Urho3D game engine that runs on iOS, Mac, Windows, Android and Linux systems
Nez 1,831 3 months ago Nez is a free 2D-focused framework that works with MonoGame and FNA
BEPUphysics 2,417 about 1 month ago BEPUphysics is a pure C# 3D physics library
Devtodev 7 5 months ago A full-cycle analytics solution for game developers
UnrealCLR 3,155 over 1 year ago Unreal Engine .NET Core integration
osu!framework 1,677 about 1 month ago A 2D application/game written with amazing games in mind
DotRecast 585 about 1 month ago A port of Recast & Detour, navigation mesh toolset for games, Unity3D, servers, C#
Foster 469 about 1 month ago Foster is a small cross-platform 2D game framework in C#
Friflo.Engine.ECS 168 about 2 months ago High-performance C# ECS with simple API. Supports .NET, WASM/WebAssembly, Native AOT, Unity, Godot, MonoGame,

Chat / GIS

NetTopologySuite 1,473 4 months ago A .NET GIS solution that is fast and reliable for the .NET platform
SharpMap An easy-to-use mapping library for use in web and desktop applications
OsmSharp C# library to work with OpenStreetMap (OSM) data. Provides reading, writing and route-planning for OSM data
GeoJSON4EntityFramework 19 almost 8 years ago A library to create GeoJSON from Entity Framework Spatial Data or Well-Known Text (WKT) inputs
GeoJSON.NET 447 5 months ago .Net library for GeoJSON types & corresponding Json.Net (de)serializers
CoordinateSharp 367 2 months ago Easily parse or convert coordinate formats and calculate location based solar/lunar information
DEM Net Elevation API 306 4 months ago .Net library for Digital Elevation Models, allows 3D terrain generation in glTF / STL format

Chat / Git Tools

Husky.Net 714 about 1 month ago Git hooks made easy with Husky.Net internal task runner, You can use it to lint your commit messages, run tests, lint code, etc... when you commit or push. supports C# scripts, gitflow hooks, Multiple file states (staged, lastCommit, glob)
Bonobo Git Server 1,811 about 1 year ago Bonobo Git Server for Windows is a web application you can install on your IIS and easily manage and connect to your Git repositories
GitExtensions 7,823 about 1 month ago GitExtensions is a shell extension, a Visual Studio 2008/2010/2012/2013 plugin and a standalone Git repository tool
GitLink 554 almost 2 years ago let's users step through their code hosted on GitHub or BitBucket
GitVersion 2,889 about 1 month ago Generate a Semantic Version Number based on the state of your Git repository
LibGit2Sharp 3,223 about 2 months ago LibGit2Sharp brings all the might and speed of libgit2, a native Git implementation, to the managed world of .NET and Mono
GitRead.Net 19 over 6 years ago GitRead.Net is a .NET Standard library which allows you to very easily interrogate a Git repository that you have on disk. It allows you to enumerate the commit log, count lines per file and list files changed by a commit
NGit 261 almost 5 years ago NGit is a port of JGit to C#
posh-git 7,743 5 months ago A PowerShell environment for Git
RepoZ 1,026 about 1 year ago A Git repository information aggregator with Windows Explorer & CLI-enhancements
Git Credential Manager for Windows 2,871 about 3 years ago Helps solving issues of credentials, made by Microsoft

Chat / Graphics

LibTessDotNet 317 almost 3 years ago .NET port of the famous GLU Tessellator, triangulates polygons
Oxyplot OxyPlot is a cross-platform plotting library for .NET
OpenTK 3,265 about 1 month ago The Open Toolkit is an advanced, low-level C# library that wraps OpenGL, OpenCL and OpenAL
NGraphics 711 11 months ago NGraphics is a cross-platform library for rendering vector graphics on .NET
Aspose.Drawing Fully managed, cross-platform, complete 2D graphic library for drawing text, geometries, and images, with System.Drawing compatible API
ScottPlot A plotting library to interactively displays large datasets. Line plots, bar charts, pie graphs, scatter plots, and more. It supports WinForms, WPF, Avalonia, Console
LiveCharts2 4,436 about 1 month ago Simple, flexible, interactive & powerful charts, maps, and gauges for .Net. LiveCharts2 supports WPF, WinForms, Xamarin, Avalonia, WinUI, UWP
Helix Toolkit Helix Toolkit is a collection of 3D components for .NET
AssimpNet A cross-platform .NET Standard wrapper for the Open Asset Importer ("Assimp"). The library enables importing, processing, and exporting of 3D models for rendering in graphics/game applications. Over 40 formats are supported for importing (e.g. OBJ, FBX, GLTF, 3DS, Collada) and a subset of those formats can be exported to (e.g. OBJ, GLTF, 3DS, Collada). Mesh processing features allow for mesh data to be generated or optimized for real-time rendering
Silk.NET 4,224 about 1 month ago A cross-platform, high-performance, low-level .NET Standard wrapper for many advanced APIs such as OpenGL, OpenCL, OpenAL, OpenXR, Assimp, GLFW, as well as many others. In addition to wrapping over Native APIs, it also comes with its own Windowing and Input abstraction. This makes game and application development with Silk.NET a breeze, and has pretty much everything a 3D application developer would need
Veldrid 2,502 7 months ago A low-level, portable graphics and compute library for .NET
RealTimeGraphX 216 over 2 years ago RealTimeGraphX is a data type agnostic, high performance plotting library for WPF, UWP and soon, Xamarin Forms
VectSharp 245 4 months ago .NET library to create vector graphics and text, and then export it to PDF, SVG and raster image formats

Chat / GraphQL

GraphQL.NET 5,886 about 1 month ago Implementation of in .Net
HotChocolate 5,284 about 1 month ago GraphQL server compatible to all GraphQL compliant clients like Strawberry Shake, Relay, Apollo Client, and various other clients and tools
graphql-net 892 over 2 years ago GraphQL to IQueryable for .NET
EntityGraphQL 421 about 1 month ago library to build a GraphQL API on top of data model with the extensibility to easily bring multiple data sources together in the single GraphQL schema (EF is not a requirement - any ORM working with LinqProvider or an in-memory object will work)
ZeroQL 280 3 months ago high-performance C#-friendly GraphQL client. It supports Linq-like syntax. It doesn't require Reflection.Emit or expressions. As a result, the runtime provides performance very close to a raw HTTP call

Chat / GUI

HandyControl 6,208 about 1 month ago Contains some simple and commonly used WPF controls
Lara 154 over 1 year ago Lara Web Engine is a library for developing Web user interfaces in C#
QtSharp 576 over 5 years ago Mono/.NET Bindings for Qt
Qml.Net 1,381 about 2 years ago A cross-platform Qml/.NET integration for Mono/.NET/.NET Core
MahApps.Metro 9,353 3 months ago Toolkit for creating Metro-styled WPF apps
Callisto 337 over 9 years ago A control toolkit for Windows 8 XAML applications. Contains some UI controls to make it easier to create Windows UI style apps for the Windows Store in accordance with Windows UI guidelines
ObjectListView ObjectListView is a C# wrapper around a .NET ListView. It makes the ListView much easier to use and teaches it some new tricks
DockPanelSuite The Visual Studio inspired docking library for .NET WinForms
AvalonEdit 1,874 8 months ago The WPF-based text editor component used in SharpDevelop
XWT 1,365 almost 2 years ago A cross-platform UI toolkit for creating desktop applications with .NET and Mono
Gtk# 430 almost 2 years ago Gtk# is a Mono/.NET binding to the cross platform Gtk+ GUI toolkit and the foundation of most GUI apps built with Mono
MaterialDesignInXamlToolkit Toolkit for creating Material Design styled WPF apps
Eto.Forms 3,691 about 1 month ago Cross-platform GUI framework for desktop and mobile applications in .NET and Mono
Dragablz 2,225 8 months ago Dragable, tearable WPF tab control (similar to Chrome) which supports layouts and is full themeable, including themese compatible with MahApps and Material Design
Fluent.Ribbon 2,571 about 1 month ago Fluent Ribbon Control Suite is a library that implements an Office- and Windows 8-like Ribbon for WPF
Office Ribbon 772 6 months ago A library that implements MS Office Ribbon for WinForms
MaterialSkin 2,917 6 months ago Theming .NET WinForms, C# or VB.Net, to Google's Material Design principles
Xamarin.Forms 5,617 9 months ago Build native UIs for iOS, Android and Windows from a single, shared C# codebase
SciterSharp 107 5 months ago Create .NET cross-platform desktop apps using not just HTML, but all features of Sciter engine: CSS3, SVG, scripting, AJAX, <video>... Sciter is free for commercial use
Empty Keys UI Multi-platform and multi-engine XAML based user interface library
UWP Community Toolkit 5,910 3 months ago The UWP Community Toolkit is a collection of helper functions, custom controls, and app services. It simplifies and demonstrates common developer tasks building UWP apps for Windows 10
ScintillaNET 968 over 1 year ago Windows Forms control for the Scintilla text editor component (Scintilla is used by Notepad++)
FastColoredTextBox 1,229 over 1 year ago Fast Colored TextBox is text editor component for .NET. Allows you to create custom text editor with syntax highlighting. It works well with small, medium, large and very-very large files
Avalonia 26,275 about 1 month ago A multi-platform .NET UI framework (formerly known as Perspex)
Modern UI for WPF - MUI 2,594 over 3 years ago Set of controls and styles to convert WPF applications into a great looking Modern UI apps
WinApi 827 about 2 years ago A simple, direct, ultra-thin CLR library for high-performance Win32 Native Interop with automation, windowing, DirectX, OpenGL and Skia helpers
Neutronium 1,346 about 2 years ago Build .NET desktop applications using HTML, CSS, javascript and MVVM bindings such as with WPF
Ooui 1,622 about 2 years ago A small cross-platform UI library that brings the simplicity of native UI development to the web
AdonisUI 1,755 over 2 years ago Lightweight UI toolkit for WPF applications offering classic but enhanced Windows visuals
Windows UI Library 6,404 about 1 month ago The Windows UI Library (WinUI) provides official native Microsoft UI controls and features for Windows UWP apps
Bunifu UI Framework Carefully crafted Winforms controls and components for creating stunning modern application UI
Ookii.Dialogs.Wpf 1,180 2 months ago Enable WPF applications to access common Windows dialogs such as task dialogs, credential dialog, progress dialog, folder browser dialog, and more
Ookii.Dialogs.WinForms 620 2 months ago Enable Windows Forms applications to access common Windows dialogs such as task dialogs, credential dialog, progress dialog, folder browser dialog, and more
UNO Platform The only platform for building native mobile, desktop and WebAssembly with C#, XAML from a single codebase. Open source and professionally supported. Website:

Chat / HTML and CSS

AngleSharp 5,197 3 months ago Complete HTML5 DOM and CSS3 OM construction
dotless 693 7 months ago .NET port of the Ruby Less CSS lib
ExCSS 341 3 months ago CSS3 parser library for C#
HtmlAgilityPack an agile HTML parser that builds a read/write DOM and supports plain XPath or XSLT
LibSass Host 85 about 2 months ago .NET wrapper around the library with the ability to support a virtual file system
LtGt 119 over 1 year ago lightweight HTML processor, can be used to parse and navigate DOM, handles CSS selectors, can convert to Linq2Xml, easily extensible, and more

Chat / HTTP

Tiny.RestClient 210 3 months ago Simpliest Fluent REST client for .NET
Http.fs 320 over 1 year ago A functional HTTP client for F#
RestSharp 9,639 about 2 months ago Simple REST and HTTP API client for .NET
Flurl Fluent, portable, testable REST/HTTP client library
EasyHttp 985 about 4 years ago HTTP library for C#
Refit 8,690 about 1 month ago The automatic type-safe REST library for Xamarin and .NET
RestEase 1,089 about 1 year ago Easy-to-use typesafe REST API client library, which is simple and customisable. Heavily inspired by Refit
RestLess 111 about 2 years ago The automatic type-safe-reflectionless REST API client library for .Net Standard
HttpClientGoodies 66 over 1 year ago utilities for working with
WebApiClient 2,062 about 2 months ago An open source project based on the HttpClient. You only need to define the c# interface and modify the related features to invoke the client library of the remote http interface asynchronously
Apizr 142 about 1 month ago Refit based web api client, but resilient (retry, connectivity, cache, auth, log, priority, etc...)
Fluxzy.Core 135 about 1 month ago A fully managed and fully streamed Man-On-The-Middle library to intercept, record and alter HTTP/1.1, H2, websocket traffic over plain or secure channels

Chat / IDE

AvalonStudio 1,626 12 months ago An extensible, cross platform IDE written in C# for Embedded C/C++, .NET Core, Avalonia and Typescript
SharpDevelop 2,091 over 4 years ago A free IDE for .NET programming languages
MonoDevelop 2,845 over 3 years ago MonoDevelop is a cross-platform IDE mostly aimed at Mono/.NET developers
Visual Studio Express The free lightweight version of Visual Studio for .NET programming
Visual Studio Community A full-featured IDE
Waf DotNetPad A simple and fast code editor that makes fun program with C# or Visual Basic
Visual Studio Code Excellent open source editor from Microsoft, based on Electron
Ionide An Atom Editor and Visual Studio Code package suite for cross platform F# development
Rider A cross-platform C# IDE based on the IntelliJ platform and ReSharper
RoslynPad 2,485 3 months ago A simple C# editor based on Roslyn and AvalonEdit
Consulo A cross-platform IDE with C# & Java support, fork of IntelliJ IDEA Community Edition
vvvv A visual live-programming environment for .NET
CSharp Analyzer by MongoDB 27 about 1 month ago A free Visual Studio Extension for MongoDB users, helping translate your code into MongoDB queries

Chat / Image Processing

ImageWizard 69 about 2 months ago Image processing webservice based on ASP.NET Core and ImageSharp / SkiaSharp / SvgNet / DocNET
ImageResizer Add commands to image URLs to get altered versions in milliseconds. Resizing, editing etc of images in real-time
ImageProcessor 2,497 over 1 year ago Open-source .NET library to manipulate images on-the-fly
ImageSharp 7,495 about 1 month ago Fully managed cross-platform library for processing of image files
MagicScaler 614 about 1 month ago High-performance image processing pipeline for .NET, focused on making complex imaging tasks simple
DynamicImage High-performance open-source image manipulation library for ASP.NET
MetadataExtractor 953 3 months ago Extracts Exif, IPTC, XMP, ICC and other metadata from image files
Emgu CV Cross-platform .NET wrapper for the OpenCV library
SimpleITK A simplified path to Insight. Open-source multi-dimensional image analysis in Python, R, Java, C#, Lua, Ruby, TCL and C++. Developed by the Insight Toolkit community for the biomedical sciences and beyond
DotImaging 313 about 5 years ago Minimalistic .NET imaging portable platform
Magick.NET 3,503 about 1 month ago .NET wrapper for the ImageMagick library
OpenCvSharp 5,457 about 1 month ago Cross platform wrapper of OpenCV for .NET Framework
PixelViewer 279 4 months ago Cross-platform (Windows/macOS/Linux) image viewer which supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it. 10/16-bit YUV and viewing image frame sequence are also supported (v1.99+)
TeximpNet A cross-platform .NET Standard library for reading/manipulating/writing image files. The primary focus is to create 2D/3D/Cubemap textures for graphics/game applications, notably to convert images to GPU compressed formats and generate mipmaps. The library wraps the FreeImage native library to import/export over 30 common image formats, and wraps the Nvidia Texture Tools native library for GPU compression features. It also has a fully featured DDS format importer/exporter written in C#
Colourful 278 3 months ago Open source .NET library for working with color spaces
Imgix-CSharp Easily update image urls to be fast and responsive
ColorHelper 69 almost 2 years ago Useful methods for work with colors
Unicolour 58 about 1 month ago Colour conversion, interpolation, and comparison for .NET

Chat / Install tools

Wix Toolset The most powerful set of tools available to create your Windows installation experience
Squirrel 7,438 6 months ago Squirrel is both a set of tools and a library, to completely manage both installation and updating your desktop Windows application
Chocolatey 10,414 about 1 month ago like or , but for Windows
Wax An interactive editor for WiX projects
Onova 522 about 2 months ago An unopinionated auto-update framework for desktop applications

Chat / Interactive programming

.NET Interactive 2,931 about 1 month ago .NET Interactive takes the power of .NET and embeds it into your interactive experiences

Chat / Internationalization

i18n 560 over 1 year ago Smart internationalization for ASP.NET MVC
MessageFormat.NET 162 3 months ago ICU MessageFormat implementation in .NET lets you write contextual UI messages (PCL library)
ResX Resource Manager 1,339 3 months ago The most popular free tool to localize all kind of applications with resx-based resources

Chat / Interoperability

CppSharp 3,153 3 months ago Tools to surface C++ APIs to C#
Sharpen 382 over 4 years ago Sharpen is an Eclipse plugin created by db4o that allows you to convert your Java project into C#
CXXI 199 over 4 years ago C++ interop framework
pythonnet 4,818 about 1 month ago Python and .NET interop framework
PInvoke Interop Assistant 434 over 5 years ago Converts C to managed P/Invoke signatures or verse visa
pinvoke 2,129 over 1 year ago A library containing P/Invoke code for latest Windows OS
LegacyWrapper 80 almost 3 years ago LegacyWrapper uses a wrapper process to call DLLs from a process of the opposing architecture (x86 or AMD64)
Pyrolite 178 11 months ago This library allows your Java or .NET program to interface very easily with the Python world. It uses the Pyro protocol to call methods on remote objects

Chat / IoC

Castle Windsor 1,519 6 months ago Castle Windsor is best of breed, mature Inversion of Control container available for .NET and Silverlight
Unity 1,664 12 months ago Lightweight extensible dependency injection container with support for constructor, property, and method call injection
Autofac 4,519 3 months ago An addictive .NET IoC container
DryIoc 1,031 about 2 months ago Simple, fast all fully featured IoC container
Ninject 2,678 7 months ago The ninja of .NET dependency injectors
Spring.Net 858 about 2 months ago Spring.NET is an open source application framework that makes building enterprise .NET applications easier
Lamar A fast IoC container heavily optimized for usage within ASP.NET Core and other .NET server side applications
LightInject 626 about 2 months ago A ultra lightweight IoC container
Simple Injector 1,220 about 2 months ago Simple Injector is an easy-to-use Dependency Injection (DI) library for .NET 4+ that supports Silverlight 4+, Windows Phone 8, Windows 8 including Universal apps and Mono
Microsoft.Extensions.DependencyInjection 15,518 about 1 month ago The default IoC container for NET applications
Scrutor 3,691 2 months ago Assembly scanning extensions for Microsoft.Extensions.DependencyInjection
VS MEF 441 about 2 months ago Managed Extensibility Framework (MEF) implementation used by Visual Studio
TinyIoC 831 about 2 years ago An easy to use, hassle free, Inversion of Control Container for small projects, libraries and beginners alike
Stashbox 142 about 2 months ago A lightweight, portable dependency injection framework for .NET based solutions

Chat / JavaScript Engines

ClearScript 1,793 about 1 month ago A library that makes it easy to add scripting to your .NET applications. It currently supports JavaScript (via V8 and JScript) and VBScript
Edge.js 5,413 2 months ago Run .NET and Node.js code in-process on Windows, macOS, and Linux
Jint 4,156 about 2 months ago JavaScript interpreter for .NET which provides full ECMA 5.1 compliance and can run on any .NET platform
Jurassic 888 about 2 months ago A implementation of the ECMAScript language and runtime. It aims to provide the best performing and most standards-compliant implementation of JavaScript for .NET
YantraJS 232 about 2 months ago JavaScript Runtime (Similar to NodeJS) for .NET Standard, compiles JavaScript to IL, support for many ES6 features, generators, CommonJS modules, CSX modules and expression compiler

Chat / Logging

Essential Diagnostics 69 about 3 years ago Extends the inbuilt features of System.Diagnostics namespace to provide flexible logging
NLog 6,330 about 2 months ago NLog - Advanced .NET and Silverlight logging
Logazmic 59 3 months ago Open source NLog viewer for Windows
ELMAH Official ELMAH site
Elmah MVC 264 6 months ago Elmah for MVC
Logary 527 over 1 year ago Logary is a high performance, multi-target logging, metric, tracing and health-check library for Mono and .NET. .NET's answer to DropWizard. Supports many targets, built for micro-services
Log4Net The Apache log4net library is a tool to help the programmer output log statements to a variety of output targets
Rollbar.NET 66 9 months ago Simplifies real-time remote error monitoring while using Rollbar.com. Open-source Rollbar Notifier SDK for any .NET-based technology stack. The SDK that can be used in any application built on the following .NET versions: .NET Core 2.0+, .NET Standard 2.0+, .NET Full Framework 4.5.1+, Mono, Xamarin, and, in general, any implementation of the .NET Standard 2.0+. It simplifies building data payloads based on exception data, tracing data, informational messages, and telemetry data and sends the payloads to the Rollbar API for remote monitoring and analysis of the hosting application's behavior
Sejil 183 about 1 year ago Capture, view and filter your ASP.NET Core app's logs right from your app. It supports structured logging, querying as well as saving log queries
Sentry 610 about 1 month ago .NET SDK for Open-source error tracking that helps developers monitor and fix crashes in real time
Serilog 7,326 about 1 month ago A no-nonsense logging library for the NoSQL era. Combines the best of traditional and structured diagnostic logging in an easy-to-use package
StackExchange.Exceptional 862 about 2 months ago Error handler used for the Stack Exchange network
Semantic Logging Application Block (SLAB) 218 over 7 years ago Extends the inbuilt features of System.Diagnostics.Tracing namespace (EventSource class) to log to several sinks including Azure Tables, Databases, files (JSON, XML, text). Supports in-process and out-of-process logging through ETW, and Rx for real-time filtering/aggregating of events
ULogViewer 422 about 1 month ago Cross-Platform (Windows/macOS/Linux) Universal Log Viewer which supports reading and parsing various type of logs. You can also define your own profile to parse and show logs
Foundatio 1,992 about 1 month ago A fluent logging API that can be used to log messages throughout your application
Exceptionless 560 3 months ago Exceptionless .NET Client
Loupe Centralized .NET logging and monitoring
elmah.io Cloud logging for .NET web applications using ELMAH. Find bugs before you go live. Powerful search, API, integration with Slack, GitHub, Visual Studio and more
BugSnag Logs errors. Includes useful diagnostic info like stack trace, session, release, etc. Has a free tier
ZeroLog 406 about 2 months ago ZeroLog is a zero-allocation .NET logging library. It provides basic logging capabilities to be used in latency-sensitive applications, where garbage collections are undesirable

Chat / Machine Learning and Data Science

Infer.NET A framework for running Bayesian inference in graphical models. It can also be used for probabilistic programming
Accord.NET Machine learning framework combined with audio and image processing libraries (computer vision, computer audition, signal processing and statistics)
Accord.NET Extensions 342 about 9 years ago Advanced image processing and computer vision algorithms made as fluent extensions
AForge.NET Framework for developers and researchers in the fields of Computer Vision and Artificial Intelligence (image processing, neural networks, genetic algorithms, machine learning, robotics)
Catalyst 752 about 2 months ago Cross-platform Natural Language Processing (NLP) library inspired by spaCy, with pre-trained models, out-of-the box support for training word and document embeddings, and flexible entity recognition models. Part of the
Deedle Data frame and (time) series library for exploratory data manipulation with C# and F# support
FsLab A collection of data science and machine learning libraries for F# and .NET
GeneticSharp 1,290 9 months ago Multi-platform genetic algorithm library for .NET Core and .NET Framework. The library has several implementations of GA operators, like: selection, crossover, mutation, reinsertion and termination
numl 431 about 6 years ago Designed to include the most popular supervised and unsupervised learning algorithms while minimizing the friction involved with creating the predictive models
ML.NET 9,071 about 1 month ago Cross-platform open-source machine learning framework which makes machine learning accessible to .NET developers
R Provider Type provider that exposes R packages and functions in a type-safe way to F# callers
F# Data 820 4 months ago F# type providers for accessing XML, JSON, CSV and HTML files (based on sample documents) and for accessing WorldBank data
Spreads 430 almost 2 years ago Series and Panels for Real-time and Exploratory Analysis of Data Streams. Spreads library is optimized for performance and memory usage. It is several times faster than other open source projects
SciSharp STACK A rich machine learning ecosystem for .NET created by porting the most popular Python libraries to C#
Synapses 70 over 3 years ago An in-memory neural network library written in F#
m2cgen 2,826 6 months ago A CLI tool to transpile trained classic ML models into a native .NET (C#, F# or Visual Basic) code with zero dependencies

Chat / Markdown Processors

MarkdownSharp Open source C# implementation of Markdown processor, as featured on Stack Overflow
F# Formatting Tools for documenting F# and C# projects. The library contains extensible Markdown parser as a core component
markdig 4,468 about 1 month ago A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET

Chat / Mail

FluentEmail 3,060 10 months ago A fluent wrapper for System.Net.Mail with Razor templating support
MailKit 6,258 about 1 month ago A complete cross-platform mail stack including IMAP, POP3, SMTP, authentication and more. Built on top of MimeKit
MailKitSimplified 80 about 2 months ago A fully-featured fluent wrapper for MailKit that makes sending emails as simple as possible
MimeKit 1,850 about 1 month ago A cross-platform .NET MIME creation and parser library with support for S/MIME, PGP, TNEF and Unix mbox spools
PreMailer.Net 657 3 months ago C# library that moves your stylesheets to inline style attributes, for maximum compatibility with e-mail clients
StrongGrid 187 2 months ago Client for SendGrid's v3 API. Not only allows you to send emails, but also allows you to bulk import contacts, manage lists and segments, create custom fields for your lists, etc. Also includes a parser for SendGrid Webhooks

Chat / Mathematics

MathNet Math.NET is an open source initiative to build and maintain toolkits covering fundamental mathematics, targeting advanced but also every day needs of .NET developers
Microsoft Automatic Graph Layout 1,365 about 2 months ago A set of tools for graph layout and viewing
UnitConversion 181 almost 3 years ago Expansible Unit Conversion Library for .NET Core and .NET Framework
ALGLIB ALGLIB is a cross-platform numerical analysis and data processing library. It supports several programming languages (C++, C#, Delphi) and several operating systems (Windows and POSIX, including Linux) and
AutoDiff 93 almost 2 years ago AutoDiff is a library for quickly computing gradients of functions defined by expressions. Mainly useful in numerical optimization
GeometRi 184 3 months ago Simple and lightweight computational geometry library for .Net
Rationals 80 3 months ago Implementation of rational number arithmetic for .NET with arbitrary precision
MKL.NET 168 3 months ago A simple cross platform .NET API for Intel MKL
AngouriMath 785 7 months ago An open-source symbolic/computer algebra library, made primarily for C# and F#. It covers a range of features and might be considered as an alternative to SymPy in .NET
Vim.Math3d 114 5 months ago A feature-rich cross-platform replacement for System.Numerics with support for consistent serialization and binary layout, and additional structures and algorithms for efficient 3D Math
WPF-Math 649 7 months ago a .NET library for rendering mathematical formulae using the LaTeX typesetting style, for the WPF framework
Jodo.Numerics 13 10 months ago Provides extra number types (such as fixed-point and non-overflowing numbers) with full support for operators, math, string-parsing etc. Extensively tested, and cross-platform compatible

Chat / Media

CSCore 2,235 7 months ago An advanced audio library, supporting playback/recording, decoding/encoding and processing of audio data in realtime (effects, visualizations, ...)
TagLib# 1,303 5 months ago TagLib# (aka taglib-sharp) is a library for reading and writing metadata in media files, including video, audio, and photo formats
LibVLCSharp 1,533 about 2 months ago Xamarin bindings for libvlc, the multimedia framework powering the VLC applications made by VideoLAN
NAudio 5,608 7 months ago Playback, decode and encode audio in a variety of file formats such as MP3, MP4, WAV, AIFF, Speex, etc
Xabe.FFmpeg 715 about 1 year ago .NET Standard wrapper for FFmpeg. It allows to process media without know how FFmpeg works, and can be used to pass customized arguments to FFmpeg from C# application
SeeShark 146 7 months ago Cross-platform camera library for .NET using FFmpeg supporting over 190 pixel formats

Chat / Metrics

C# StatsD Client 110 almost 6 years ago C# client for Etsy's StatsD
Foundatio 1,992 about 1 month ago A common interface with in-memory, Redis, StatsD, and Metrics.NET implementations

Chat / Micro Framework

.NET Micro Framework Interpreter 487 over 6 years ago Microsoft® .NET Micro Framework (NETMF) for developing embedded applications on small devices using Visual Studio

Chat / Minification

Microsoft Ajax Minifier Contains JS and CSS minifiers which have a highest performance, because its have been specifically designed for .NET. Optionally produce Source Maps for JS code
Web Markup Minifier 457 about 1 month ago .NET library that contains a set of markup minifiers. The objective of this project is to improve the performance of web applications by reducing the size of HTML, XHTML and XML code
CompressedStaticFiles 88 10 months ago Send compressed static files to the browser without having to compress on demand, also has support for sending more advanced image formats when the browser indicates that i has support for it

Chat / Misc

CSharp Pad A web-based C# REPL with awesome code completion
AzureCrawler 43 almost 11 years ago Take HTML Snapshots for your Angular, Ember, Durandal or any JavaScript applications
CSScript CS-Script is a CLR based scripting system which uses C# as a programming language. CS-Script currently targets Microsoft implementation of CLR (.NET 2.0/3.0/3.5/4.0/4.5) with full support on Mono. Comes with many additional features, such as script hosting
CsvHelper 4,810 4 months ago Library to help reading and writing CSV files
RecordParser 295 5 months ago Library to help reading and writing CSV and Flat files with zero heap allocation
Hashids.net 3,325 about 1 year ago Generate short unique ids from integers, as per
ConsoleTableExt 332 6 months ago Fluent library to create table for .Net console application
FlatMapper 93 over 4 years ago A library to import and export data from and to plain text files in a LINQ-compatible way
FluentValidation 9,159 2 months ago A small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules
FormHelper 272 about 2 years ago Form & Validation Helper for ASP.NET Core. Form Helper helps you to create ajax forms and validations without writing any javascript code. (Compatible with Fluent Validation)
Guard 711 over 1 year ago A high-performance, extensible argument validation library
Valit 322 about 5 years ago Valit is dead simple, fluent validation for .NET Core
Validot 311 5 months ago Validot is a performance-first, compact library for advanced model validation. Using a simple declarative fluent interface, it efficiently handles classes, structs, nested members, collections, nullables, plus any relation or combination of them. It also supports translations, custom logic extensions with tests, and DI containers
Humanizer 8,712 3 months ago Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities
LINQPad a C#/VB/F# scratchpad that instantly executes any expression, statement block or program with rich output formatting and a wealth of features. Also lets you interactively query databases in LINQ. [$]
LINQPad.QueryPlanVisualizer 400 8 months ago View SQL Server and Postgres query plans directly inside LINQPad
Polly 13,487 about 1 month ago Express transient-exception-handling and resilience policies such as Retry, Wait-and-Retry, Circuit Breaker, and Bulkhead Isolation in a fluent manner. Fully thread-safe and full async support. (4.0 / 4.5 / .NET Core / .NET Standard / Xamarin)
Rant 2,962 over 4 years ago The Rant Procedural Text Generation DSL
ScriptCS 2,473 over 1 year ago Write C# apps with a text editor, NuGet and the power of Roslyn!
Shielded 241 about 2 years ago Software Transactional Memory (STM) implementation for .NET
MSBuild ILMerge task MSBuild ILMerge task is a NuGet package allows you to use the famous ILMerge utility in automated builds and/or Visual Studio projects
ReactJS.NET 2,301 over 1 year ago ReactJS.NET is a library that makes it easier to use Babel along with Facebook's React and JSX from C#
Aeron.NET 489 about 1 year ago Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron
TypeShape 302 2 months ago TypeShape is a small, extensible F# library for practical generic programming
Streams 383 over 4 years ago A lightweight F#/C# library for efficient functional-style pipelines on streams of data
Warden 616 almost 7 years ago Define "health checks" for your applications, resources and infrastructure. Keep your Warden on the watch
ByteSize 562 4 months ago ByteSize is a utility class that makes byte size representation in code easier by removing ambiguity of the value being represented. ByteSize is to bytes what System.TimeSpan is to time
Jot 633 9 months ago a library for persisting and restoring application state (a better alternative to .settings files)
Enums.NET 1,750 5 months ago Enums.NET is a high-performance type-safe .NET enum utility library
HidLibrary 591 9 months ago This library enables you to enumerate and communicate with Hid compatible USB devices in .NET
SystemWrapper 174 over 1 year ago SystemWrapper is .NET library for easier testing of system APIs
YoutubeExplode 2,994 about 1 month ago Ultimate library for extracting metadata and downloading Youtube videos and playlists
DeviceId 799 about 2 months ago Generate a 'device ID' that can be used to uniquely identify a computer
DeviceDetector.NET 355 about 1 month ago The Universal Device Detection library will parse any User Agent and detect the browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), brand and model
NaturalSort.Extension 175 about 1 month ago Extension method for StringComparer that adds support for natural sorting (e.g. "abc1", "abc2", "abc10" instead of "abc1", "abc10", "abc2")
Coravel 3,930 2 months ago Near-zero config .NET Core library that makes Task Scheduling, Caching, Queuing, Mailing, Event Broadcasting (and more) a breeze!
Quickenshtein 285 about 1 year ago An extremely quick and memory efficient Levenshtein Distance calculator with SIMD and Threading support
Infinity Crawler 248 about 1 year ago A simple but powerful web crawler library for .NET
Build Versioning 59 about 2 months ago Simple build versioning for .NET, powered by Git tags
SystemTextJson.JsonDiffPatch 108 9 months ago High-performance, low-allocating JSON object diff and patch extension for System.Text.Json. Support generating patch document in RFC 6902 JSON Patch format
dotnet-exec 51 about 1 month ago A command-line tool for executing C# program without a project file, and you can have your custom entry point other than Main method

Chat / MQTT

HiveMQtt 64 about 1 month ago The HiveMQ C# MQTT client for .NET
MQTTNet 4,520 about 1 month ago A high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker)

Chat / MVVM

Community Toolkit Collection of control & helper libraries and samples for various .NET technologies. Contains modern MVVM library, supported by Microsoft. Includes , , and
Caliburn.Micro 2,805 about 1 month ago A small, yet powerful framework, designed for building applications across all XAML platforms. Its strong support for MV* patterns will enable you to build your solution quickly, without the need to sacrifice code quality or testability
MVVM Light Toolkit 1,174 over 3 years ago The main purpose of the toolkit is to accelerate the creation and development of MVVM applications in WPF, Silverlight, Windows Store (RT) and for Windows Phone
Catel Catel is an application development platform with the focus on MVVM (WPF, Silverlight, Windows Phone and WinRT) and MVC (ASP.NET MVC). The core of Catel contains an IoC container, models, validation, memento, message mediator, argument checking, etc
UpdateControls Update Controls does not require that you implement or declare a . It connects controls directly to CLR properties. This makes it perfect for the Model/View/ViewModel pattern
ReactiveUI 8,139 about 1 month ago An MVVM framework for .NET that integrates the Reactive Extensions (Rx) framework, enabling developers to build elegant, testable applications using WPF, Windows Store Apps, WP8 or Xamarin
Okra App Framework An app centric MVVM framework for Windows 8.1 built with dependency injection in mind, including a full set of Visual Studio MVVM templates
Prism 6,383 about 2 months ago A cross-platform desktop and mobile MVVM development framework
Win Application Framework (WAF) 718 about 1 month ago A lightweight Framework that helps you to create well structured WPF and UWP Applications. It supports you in applying a Layered Architecture and the Model-View-ViewModel pattern
MVVMCross 3,877 2 months ago Cross-platform mvvm mobile development framework for WPF, Silverlight for WP7 and WP8, Mono for Android, MonoTouch for iOS, Windows Universal projects (WPA8.1 and Windows 8.1 Store apps). Makes extensive use of Portable Class Libraries (PCL) to provide maintainable cross platform C# native applications
Stylet 997 7 months ago Minimal MVVM framework inspired by Caliburn Micro, with good documentation, high test coverage, and its own IoC container
Gemini 1,102 over 1 year ago IDE framework similar in concept to the Visual Studio Shell. Built on WPF, AvalonDock, and Caliburn Micro
Toms Toolbox 106 3 months ago Visual Composition framework to easily build modularized MVVM applications based on the
MVVM Dialogs 665 about 2 months ago Framework simplifying the concept of opening dialogs from a view model when using MVVM in WPF or UWP
Smaragd 36 over 4 years ago A platform-independent, lightweight library for developing .NET applications using the MVVM architecture
EBind 163 over 3 years ago A concise, fast and feature-rich .NET data binding solution

Chat / Networking

NetCoreServer 2,822 9 months ago Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution (NETStandard)
SharpPcap 1,368 about 1 month ago Fully managed, cross platform (Windows, Mac, Linux) .NET library for capturing packets from live and file based devices

Chat / Object to object mapping

AutoMapper 9,963 about 2 months ago A convention-based object-object mapper in .NET
TinyMapper 691 8 months ago A tiny and quick object mapper for .NET
ExpressMapper 310 about 3 years ago A lightweight, lighting fast .NET mapper to map one type of object(s) to another in automated and easy way. ExpressMapper relies completely on the expression trees
AgileMapper 460 over 2 years ago A zero-configuration Object-Object mapper supporting .NET Standard 1.0
Mapperly 3,007 about 1 month ago A .NET source generator for generating object mappings. No runtime reflection
Mapster 4,399 7 months ago A high performance object mapper in .net

Chat / Office

ExcelDna 1,316 about 1 month ago ExcelDna makes it easier to create and deploy Excel Add-Ins using C#, F# or VB .NET
ClosedXML 4,841 about 1 month ago ClosedXML makes it easier for developers to create Excel 2007/2010 files
OfficeIMO 292 about 1 month ago OfficeIMO makes it easier for developers to create/modify Word (docx) files without having Microsoft Word or Office installed
NPOI 83 about 1 month ago This project is the .NET version of POI Java project at
EPPlus 3,763 over 4 years ago EPPlus is a .NET library that reads and writes Excel 2007/2010 files using the Open Office XML format (xlsx)
Open XML SDK 4,071 about 1 month ago The Open XML SDK provides open-source libraries for working with Open XML Documents (DOCX, XLSX, and PPTX)
DocX 1,785 7 months ago DocX is a .NET library that allows developers to manipulate Word 2007/2010/2013 files, it does not require Microsoft Word or Office to be installed
ExcelDataReader 4,020 3 months ago Lightweight and fast library written in C# for reading Microsoft Excel files (2.0-2007)
NetOffice 703 about 1 month ago .NET wrapper assemblies for Microsoft Office applications
GemBox.Bundle A package of .NET components that enable fast, simple and efficient processing of office files (Excel, Word, PowerPoint, PDF and emails)
Outlook Redemption Library to work with the Outlook Object Model and (Extended) MAPI. Supports Outlook 98 - 2019. Work with objects/mails/accounts/folders in Exchange and Outlook
ShapeCrawler 307 about 1 month ago A fluent API for the processing of PowerPoint presentations without Microsoft Office installed
MiniExcel 2,843 about 1 month ago A micro Excel helper avoids OOM and high performance to create/mapping/template-fill-data
Toxy 362 3 months ago .NET text extraction framework supports a few file formats
Syncfusion .NET Word Framework A high-performance .NET Word framework without Microsoft Office or interop dependencies. Create, read, and edit Word documents seamlessly. Utilize advanced editor components for easy viewing, editing, and printing. Effortlessly convert Word documents to PDF, HTML, RTF, ODT, and EPUB formats with powerful conversion APIs
Syncfusion .NET Excel Framework A high-performance .NET Excel framework without Microsoft Office or interop dependencies. Create, read, and edit Excel documents seamlessly. Utilize Spreadsheet controls for creating, editing, and viewing easily. Effortlessly convert Excel files to PDF, images, and more with powerful conversion APIs
Syncfusion .NET PowerPoint Framework A high-performance .NET PowerPoint framework without Microsoft Office or interop dependencies. Create, read, and edit PowerPoint files seamlessly. Effortlessly convert PowerPoint files to PDFs and images with powerful conversion APIs

Chat / OpenAI

Cledev.OpenAI 116 over 1 year ago .NET SDK for OpenAI which includes ChatGPT, DALL-E and Whisper APIs and a Blazor Server playground

Chat / ORM

Entity Framework 6 1,431 about 1 month ago Object-relational mapper that enables .NET developers to work with relational data using domain-specific objects
Entity Framework Core 13,838 about 1 month ago Object-relational mapper that enables .NET developers to work with relational data using domain-specific objects
EntityFramework.Exceptions 1,535 about 1 month ago Use typed Exceptions for Entity Framework Core when your SQL query violates database constraints in SqlServer, MySql, PostgreSQL or SQLite
EntityFrameworkCore.SqlServer.SimpleBulks 161 3 months ago Simple library that can help to sync a large number of records in-memory into the database. Lambda Expression is supported
EFCore.BulkExtensions 3,698 about 1 month ago Entity Framework Core Bulk Extensions for super fast (BulkCopy) CRUD ops + SaveChanges on multiple DBs: SQL, PG, My, Lite
Dapper 17,629 about 1 month ago A simple object mapper for .NET by
Dapper Extensions 1,792 12 months ago Small library that complements Dapper by adding basic CRUD operations (Get, Insert, Update, Delete) for your POCOs
Dapper.FastCRUD 506 8 months ago The fastest micro-ORM extension for Dapper
DapperQueryBuilder 524 8 months ago Dapper Query Builder using String Interpolation and Fluent API
SqlSugar 5,424 about 1 month ago Another ORM library supports many RDBMS including MySql, SqlServer, Sqlite, Oracle, Postgresql
FreeSql a convenient ORM in dotnet, supports MySql, SqlServer, PostgreSQL, Oracle, Sqlite, Firebird, 达梦, 人大金仓, 神舟通用, 翰高 and Access
NHibernate NHibernate Object Relational Mapper
Fluent NHibernate 1,656 about 1 month ago Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate
FluentMigrator 3,281 about 1 month ago Fluent Migrations framework for .net
ServiceStack.OrmLite 1,527 about 2 years ago Light, simple and fast convention-based POCO ORM
Massive 1,798 over 7 years ago A small, happy, data access tool that will love you forever
LINQ to DB 3,007 about 1 month ago The fastest LINQ database access library offering a simple, light, fast, and type-safe layer between your POCO objects and your database
MicroLite ORM 85 almost 5 years ago MicroLite ORM is a micro Object Relational Mapper for the .NET framework. It is designed to be easy to use, extensible and testable
PetaPoco 2,074 4 months ago A tiny ORM-ish thing for your POCOs
AsyncPoco 127 12 months ago A long-"awaited" fully asynchronous PetaPoco fork
NPoco 850 12 months ago Simple microORM that maps the results of a query onto a POCO object. Based on Schotime's branch of PetaPoco
Limebean 28 over 5 years ago Hybrid ORM which uses SQL fragments and doesn't require Model Classes
LLBLGen Pro Entity Modeling solution for Entity Framework, NHibernate, Linq to SQL and its own ORM framework: LLBLGen Pro Runtime Framework
Insight.Database 864 4 months ago Insight.Database is a fast, lightweight, micro-ORM for .NET
DbExtensions Data-access framework with a strong focus on query composition, granularity and code aesthetics
SmartSql 1,104 about 1 month ago SmartSql = MyBatis + Cache(Memory | Redis)+ ZooKeeper + R / W Splitting + Dynamic Repository
RepoDb 1,725 3 months ago A hybrid ORM library for .NET
Venflow 170 about 2 years ago A super fast and lightweight ORM for PostgreSQL
MongoFramework 393 about 2 months ago An "Entity Framework"-like interface for MongoDB
Friflo.Json.Fliox 168 about 2 months ago High performane ORM for Sqlite, MySql, SqlServer, PostgreSQL & NoSQL. Provides server with REST, GraphQL & WebSocket / PubSub API

Chat / Package Management

NuGet The .NET package manager
BaGet 2,632 6 months ago A cross-platform, lightweight NuGet and Symbol server
Cloudsmith A fully managed package management SaaS, with support for NuGet, Npm, Docker and much more
MyGet Hosted Package Repository for NuGet, NPM, Bower and VSIX. Also provides CI as-a-Service
Paket 2,021 about 2 months ago A package dependency manager for .NET with support for NuGet packages and GitHub repositories
Sleet 364 about 2 months ago A NuGet v3 static feed generator with support for AWS S3 and Azure Storage

Chat / PDF

QPdfSharp 17 11 months ago A C# wrapper written around QPdf to allow for easy PDF manipulation that is tested for both linux and windows. QPdf is one of the only libraries capable of PDF linearization, and this wrapper ensures you keep up to date with the underlying improvements
Cloudmersive PDF Cloudmersive PDF is a native .NET Framework and .NET Core NuGet library and API service that can create, modify, encrypt or convert PDF documents at high scale and fidelity; and is free to use with no expiration
Docotic.Pdf PDF library to create, read, edit, draw, and print PDF documents in .NET and .NET Core applications. 100% managed, without unsafe blocks
ITextSharp 1,371 7 months ago iText is a PDF library that allows you to CREATE, ADAPT, INSPECT and MAINTAIN documents in the Portable Document Format (PDF)
PdfiumViewer 975 over 3 years ago PdfiumViewer is a PDF viewer based on the PDFium project
WkhtmlToPdf 265 6 months ago C# wrapper around wkhtmltopdf console utility. Allow to generate preety PDF using HTML and CSS
Pdfium.Net SDK Advanced C# PDF library for render, create, edit, merge, split, print, and view PDFs. Open source PDF Viewer is available on . A is also available for easy inclusion into your projects
PdfPig Read and create and extract text and other content from PDFs in C# (port of PdfBox)
QuestPDF QuestPDF is an open-source, modern and battle-tested library that can help you with generating PDF documents by offering friendly, discoverable and predictable C# fluent API
Kevsoft.PDFtk 37 10 months ago A wrapper to drive the awesome pdftk binary, which can fill PDF forms, get field information, concatenate multiple documents or pages, split documents, add or replace stamps, and can attach files to or download files from pages
IronPDF High-performance C# PDF library with compatibility for various .NET versions, HTML to PDF conversion, content page conversion, file format support (e.g., DOCX, RTF, MD), responsive layouts, and robust PDF capabilities features ranging from compability, generating PDFs, formatting PDFs, and editing PDFs
Syncfusion .NET PDF Framework A high-performance .NET PDF framework with no Adobe dependencies. Create, read, and edit PDF files seamlessly. Utilize PDF viewer controls for easy viewing, reviewing, and printing. Effortlessly convert HTML, Word, Excel, PowerPoint files, and images to PDF with powerful conversion APIs

Chat / Profiler

MiniProfiler 2,928 about 2 months ago A simple but effective mini-profiler for ASP.NET websites
Glimpse 2,320 almost 4 years ago The open source diagnostics platform for the web
Unchase.FluentPerformanceMeter 42 almost 4 years ago An open-source and cross-platform .Net Standard 2.0 library that is designed for the method’s performance measurement

Chat / Protocols

SSH.NET 4,034 about 1 month ago A Secure Shell (SSH) library for .NET, optimized for parallelism. Provides SSH commands, SFTP/SCP uploads and downloads, and SOCKS4/SOCKS5/HTTP proxies
FluentFTP 3,153 about 1 month ago An FTP and FTPS library for .NET, optimized for speed. Provides extensive FTP commands, file uploads/downloads and FTP proxies
SharpSnmpLib An open source SNMP implementation for .NET/Mono/Xamarin. Version 1, 2c, and 3 are supported
DNS 417 8 months ago A library for parsing and serializing DNS messages. Includes a basic DNS client and server
DnsClient.NET 792 4 months ago A simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups
Tecan SiLA2 SDK A library and code generator to develop SiLA2 clients and servers

Chat / Push Notifications

PushSharp 4,382 over 1 year ago A server-side library for sending Push Notifications to iOS, OSX, Android, Chrome, Windows Phone, Windows 8, Blackberry, and Amazon devices

Chat / Query Builders

SqlKata Elegant SQL query builder, that supports complex queries, joins, sub queries, nested where conditions, vendor engine targets and more
InterpolatedSql 126 4 months ago SQL Builder using String Interpolation and Fluent API

Chat / Queue

CAP 6,730 about 1 month ago An EventBus with local persistent message functionality for RabbitMQ or Kafka
Cap.Outbox 10 about 2 months ago Implementation of the Outbox pattern and OnceExecutor service that guarantees idempotence: the operation will be performed once
NServiceBus 2,103 about 1 month ago The most popular service bus for .NET
Gofer.NET 544 about 2 years ago Easy C# API for Distributed Background Tasks/Jobs for .NET Core. Inspired by celery for python
Hangfire 9,470 about 1 month ago Incredibly easy way to perform fire-and-forget, delayed and recurring tasks inside ASP.NET applications
RabbitMQ.NET 2,101 about 1 month ago Implementation of an AMQP client library for C#, and a binding exposing AMQP services via WCF
NetMQ 2,973 6 months ago NetMQ is 100% native C# port of ZeroMQ
MassTransit 7,072 about 1 month ago MassTransit is lean service bus implementation for building loosely coupled applications using the .NET Framework
Rebus 2,339 about 2 months ago Rebus is a lean service bus implementation for .NET, similar in nature to NServiceBus and MassTransit, only leaner
RestBus 367 over 2 years ago A service-oriented .NET messaging library for RabbitMQ
RawRabbit 747 about 2 years ago A modern .NET Core library for RabbitMQ
EasyNetQ 2,910 about 2 months ago An easy to use .NET API for RabbitMQ
Warewolf ESB 273 about 1 month ago An easy to use service bus and microservices platform. Easily build applications and services in a visual IDE
Confluent's .NET Client 96 about 1 month ago Confluent's .NET Client for Apache Kafka
Foundatio 1,992 about 1 month ago A common interface with in-memory, Redis and Azure implementations
Kafunk 160 about 4 years ago F# Kafka client from Jet
Brighter 2,046 about 1 month ago Command Dispatcher, Processor, and Distributed Task Queue
Silverback A simple but feature-rich message bus for .NET core (supports Kafka, RabbitMQ and MQTT)
SlimMessageBus 486 about 1 month ago Lightweight message bus with transports for popular messaging systems (Kafka, Redis, Azure Service Bus, and others) and in-memory communication
AsyncMonolith 52 5 months ago Facilitates simple asynchronous messaging in dotnet apps

Chat / RPC

gRPC 4,229 about 1 month ago An RPC library and framework for .NET Core. Read more about it on
CoreRPC 82 6 months ago Extensible library for WCF-like RPC targeting netstandard1.3. Compatible with .NET, Mono and .NET Core
BloomRPC 9,011 about 2 years ago BloomRPC aims to provide the simplest and most efficient developer experience for exploring and querying your GRPC services
gRPCurl 11,014 about 2 months ago gRPCurl is a command-line tool that lets you interact with gRPC servers. It's basically curl for gRPC servers
gRPC UI 5,274 about 1 month ago gRPC UI is a command-line tool that lets you interact with gRPC servers via a browser. It's sort of like Postman, but for gRPC APIs instead of REST

Chat / Reactive Programming

Rx.NET 6,752 about 1 month ago The Reactive Extensions (Rx) is a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators
Dynamic Data 1,750 about 1 month ago Reactive Extensions (Rx) for collections
ObsevableComputations 114 almost 2 years ago A cross-platform .NET library for computations whose arguments and results are objects that implement INotifyPropertyChanged and INotifyCollectionChanged (ObservableCollection) interfaces

Chat / Real-time Communications

SIPSorcery 1,519 about 1 month ago A cross platform C# .NET library supporting SIP, VoIP and WebRTC

Chat / Regular Expression

RegExtract 698 11 months ago Clean & simple idiomatic C# RegEx-based line parser that emits strongly typed results
Gigantor 22 over 1 year ago Fast regular expressions supporting gigantic files combining System.Text.RegularExpressions.Regex with multi-threading

Chat / Scheduling

FluentScheduler 2,684 almost 2 years ago Task scheduler with fluent interface that runs automated jobs from your application
NCrontab 919 6 months ago Class library for parsing & formatting expressions as well as calculating occurrences of time based on a crontab schedule
NCrontab.Scheduler 14 about 1 year ago Simple task scheduler library for scheduling NCrontab-based tasks
QuartzNet 6,581 about 1 month ago Quartz Enterprise Scheduler .NET
Hangfire An easy way to perform fire-and-forget, delayed and recurring tasks inside .NET apps
Chroniton 182 about 8 years ago A simple, fully integrable, and customizable library for running strongly typed jobs (tasks) on schedules
DurableTask 1,537 2 months ago This framework allows users to write long running persistent workflows in C# using the async/await capabilities
Workflow Core 5,419 2 months ago Lightweight embeddable workflow engine

Chat / SDK and API Clients

AWS SDK 2,077 about 1 month ago The AWS SDK for .NET enables .NET developers to easily work with Amazon Web Services
Azure PowerShell 4,275 about 1 month ago A set of PowerShell cmdlets for developers and administrators to develop, deploy and manage Microsoft Azure applications
Countly SDK for Windows 25 2 months ago Windows SDK for Countly analytics and marketing platform for product and marketing managers
Octokit.NET 2,712 about 2 months ago A GitHub API client library for .NET
Dropbox.NET 335 6 months ago Official .NET SDK for the Dropbox API
Getty Images API SDK 11 3 months ago SDK for the Getty Images and iStock APIs
Cloudmersive APIs An API client library for .NET
Elasticsearch .NET 3,590 about 2 months ago Elasticsearch.Net & NEST
PlainElastic.Net 160 over 3 years ago Plain .NET client for ElasticSearch
SolrNet 942 6 months ago Solr client for .NET
SolrExpress 66 over 4 years ago A simple and lightweight query .NET library for Solr, in a controlled, buildable and fail fast way
Lucene.net Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users

Chat / Serialization

Ceras 484 about 1 year ago Ceras is a binary serializer. It converts any object into a byte[] and back. It goes above and beyond in terms of features, speed, and comfort. Supports reference loops, large/complicated inheritance chains, splitting objects into parts and more
CsvExport 166 7 months ago Very simple & lightweight CSV exporter, Excel friendly, escapes text & quotes etc
Protobuf.NET 4,714 3 months ago Protocol buffers is the name of the binary serialization format used by Google for much of their data communications
Json.NET 10,855 3 months ago Popular high-performance JSON framework for .NET
ServiceStack.Text 1,220 almost 3 years ago JSON, JSV and CSV Text Serializers used in servicestack.net
Msgpack-Cli 835 6 months ago MessagePack implementation for Common Language Infrastructure
Jil 2,147 9 months ago Fast .NET JSON serializer, built on Sigil (used by StackOverflow)
ProtoBuf 308 over 2 years ago Generate C# code for protocol buffer serialization from a .proto specification
FlatSharp 513 about 2 months ago Fast, idiomatic FlatBuffers implementation. Use .fbs files or attributes
F# Data F# type providers for accessing XML, JSON, CSV and HTML files (based on sample documents) and for accessing WorldBank data
Bond 2,615 2 months ago cross-platform framework for working with schematized data. It supports cross-language de/serialization and powerful generic mechanisms for efficiently manipulating data
Hyperion 278 about 1 month ago A high performance polymorphic serializer for the .NET framework
FileHelpers 1,136 over 1 year ago free and easy to use .NET library to import or export data from fixed length or delimited records in files, strings or streams
FsPickler 326 almost 3 years ago A fast multi-format message serializer for .NET
Migrant 46 5 months ago Fast and flexible serialization framework usable on undecorated classes
Utf8Json 2,364 over 2 years ago Fast and Zero Allocation JSON Serializer for C#(.NET, .NET Core, Unity and Xamarin), this serializer write/read directly to UTF8 binary so boostup performance
ObjectDumper.NET 399 3 months ago Serializes in-memory object to C# code
FluentSerializer 20 10 months ago A profile-based Serializer for multiple data-formats

Chat / SMS and Phone calls

Twilio-csharp 678 about 1 month ago A C#/.NET Library for sending and receiving phone calls and text messages with Twilio

Chat / State machines

Stateless 5,644 about 2 months ago Create state machines and lightweight state machine-based workflows directly in .NET code
Automatonymous 742 about 2 years ago A state machine library for .NET - allows you to write fluent style state machines
LiquidState 241 over 4 years ago Efficient asynchronous and synchronous state machines for .NET

Chat / Static Site Generators

FsBlog 132 over 6 years ago Blog aware, static site generation using F#
Pretzel 595 over 4 years ago A site generation tool (and then some) for .NET platforms
Sandra.Snow 235 about 1 year ago Jekyll-inspired static site generation for .NET
Wyam A simple to use, highly modular, and extremely configurable static content generator

Chat / Strong Naming

Strong Namer 332 8 months ago Automatically add strong names to referenced assemblies which do not already have a strong name. This will allow you to reference and use (NuGet packages with) assemblies which are not strong named from your projects that do use a strong name
.NET Assembly Strong-Name Signer 329 12 months ago Utility software to strong-name sign .NET assemblies, including assemblies you do not have the source code for

Chat / Style Guide

C# Style Guide StackOverflow Q & A on style guides
C# Coding Conventions Official MSDN C# code conventions
C# Async Guidance 8,127 8 months ago list of problematic asynchronous patterns for .NET Core with an explanation of how to solve those issues

Chat / Template Engine

RazorEngine 2,141 over 3 years ago Open source templating engine based on Microsoft's Razor parsing engine
RazorLight 1,536 7 months ago Open source template engine based on Microsoft's Razor parsing engine supporting .NET Standard 2.0
Nustache 597 over 1 year ago Open source library for logic-less templates
Stubble 412 over 1 year ago Trimmed down {{mustache}} templates in .NET. Successor of Nustache
DotLiquid 1,060 about 1 month ago C# port of the Ruby Liquid templating language
Mustache Sharp 306 about 5 years ago An extension of the mustache text template engine for .NET
Scriban 3,246 2 months ago A fast, powerful, safe and lightweight text templating language and engine for .NET
Morestachio 51 about 2 months ago A full sized {{mustache}} like template engine with focus on extendibility
Fluid 1,453 about 1 month ago Fluid is an open-source .NET template engine based on the Liquid template language
SmartFormat 1,116 about 1 month ago A lightweight text templating library written in C# which can be a drop-in replacement for string.Format
Handlebars.Net 1,282 10 months ago A real .NET Handlebars engine

Chat / Testing

ArchUnitNET 941 about 1 month ago Simple library for checking the architecture of C# code with a fluent API
NetArchTest 1,424 6 months ago A fluent API for .Net Standard that can enforce architectural rules in unit tests
AutoFixture 3,368 4 months ago AutoFixture is an open source framework for .NET designed to minimize the 'Arrange' phase of your unit tests
BDTest 82 about 1 month ago A behaviour driven testing and reporting framework!
BDDfy 421 over 5 years ago BDDfy is the simplest BDD framework EVER!
Bogus 8,920 about 2 months ago A simple and sane fake data generator for C#. Based on and ported from the famed faker.js
ExpressionToCode 161 about 2 months ago Use plain C# syntax in assertions that include both the expression expression and subexpression values in the failure message
FakeItEasy 1,713 3 months ago The easy mocking library for .NET
Fluent Assertions 3,811 about 1 month ago A set of .NET extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style test
FluentAutomation 235 over 2 years ago Simple Fluent API for UI Automation
FsCheck 1,169 about 1 month ago Random Testing for .NET
Fuchu 120 over 1 year ago A unit-testing library for F# with tests-as-values which makes DSLs extremely easy to create
Machine.Specifications 887 about 1 month ago Machine.Specifications (MSpec) is a context/specification framework that removes language noise and simplifies tests
Moq 5,985 about 2 months ago The most popular and friendly mocking framework for .NET
Moq.Contrib.HttpClient 190 over 2 years ago A set of extension methods for mocking HttpClient and IHttpClientFactory with Moq
NBomber 2,084 about 1 month ago Very simple load testing framework for Pull and Push scenarios. It's 100% written in F# and targeting .NET Core and full .NET Framework
NBuilder 479 7 months ago Rapid generation of test objects
NCrunch An automated continuous & concurrent testing tool for Visual Studio
NFluent NFluent is an assertion library which aims to fluent your .NET TDD experience
NSubstitute A friendly substitute for .NET mocking frameworks
NUnit 2,531 about 1 month ago A unit-testing framework for all .NET languages
Rhino Mocks 257 almost 8 years ago Dynamic Mocking Framework for .NET
Testcontainers 3,848 about 1 month ago A library to support tests with throwaway instances of Docker containers for all compatible .NET Standard versions
SecTester 1 about 2 months ago SecTester is a new tool that integrates enterprise-grade scan engine directly into your integration or e2e tests
Shouldly 2,054 about 1 month ago Shouldly is an assertion framework which focuses on giving great error messages when the assertion fails while being simple and terse
Snapshooter 304 10 months ago A snapshot testing tool for .NET Core and .NET Framework
SpecFlow Binding business requirements to .Net code
Stryker.NET 1,795 about 1 month ago Mutation testing for .NET Core projects
xBehave.net 381 over 3 years ago An xUnit.net extension for describing your tests using natural language
xUnit.net 4,252 about 1 month ago A free, open source, community-focused unit testing tool for the .NET Framework
Canopy 508 over 2 years ago Canopy is a free, open source F# web automation and testing framework
Expecto 679 3 months ago A smooth testing framework for F# with tests as values. Unit testing, property based testing, performance testing and stress testing
ReportPortal AI-powered Test Automation Dashboard. Acquire, aggregate and analyze test reports to ascertain release health
Compare-Net-Objects 1,073 6 months ago Perform a deep compare of any two .NET objects using reflection. Shows the differences between the two objects
Verify 2,938 about 1 month ago Verification tool to enable simple approval of complex models and documents
CsCheck 164 about 1 month ago Random testing library for C#. Including concurrency, causal profiling, regression and performance testing

Chat / Tools

Downloader 1,365 about 2 months ago Fast and reliable multipart downloader with asynchronous progress events for .NET applications
Fiddler The free web debugging proxy for any browser, system or platform
Open Live Writer 2,458 7 months ago Blog writer which integrated with WordPress, Blogger, et. al. Open Live Writer makes it easy to write, preview, and post to your blog
CodeHub 22,820 over 2 years ago CodeHub is the best way to browse and maintain your GitHub repositories on any iOS device!
ShareX 30,078 about 2 months ago ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to over 80 supported destinations you can choose from
Myrtille 1,822 11 months ago A native HTML4/5 Remote Desktop Protocol client, HTTP gateway written in C# for .NET
Opserver 4,517 about 2 months ago Stack Exchange's Monitoring System
CatLight Build status notifications for TFS/Jenkins/Travis/Appveyor. Cross-platform desktop app based on .NET Core and Electron
Mockaco 337 about 2 months ago API mock server with fast setup, useful to simulate HTTP responses, leveraging ASP.NET Core features, built-in fake data generation and C# scripting engine powered by Roslyn scripting API
Netling 1,347 about 2 years ago A load tester client for easy web testing. It is extremely fast while using little CPU or memory
Papercut 2,979 2 months ago Papercut is an open source (.NET based) test email viewer that runs locally with a built-in SMTP server designed to receive and notify of test email messages
Visual Studio Uninstaller 3,934 almost 6 years ago Uninstall and clean up all components of Visual Studio
Fake JSON Server 390 about 2 months ago Fake REST API for prototyping or as a CRUD Back End. No need to define types, uses dynamic typing. Data is stored to a single JSON file. Has authentication, WebSocket notifications, async long running operations, random generation for errors/delays and experimental GraphQL support
posh-dotnet 45 about 7 years ago tab completion for the
SmartCode 572 about 1 year ago SmartCode = IDataSource -> IBuildTask -> IOutput => Build Everything!!! (Including [ ])
NETworkManager 6,706 about 1 month ago A powerful tool for managing networks and troubleshoot network problems!
AnyStatus A desktop notifications app for monitoring CI/CD pipelines, servers, network, health and metrics. AnyStatus supports Azure DevOps, Jenkins, TeamCity, AppVeyor and more
OctoLinker 5,287 over 1 year ago Navigate through , , , , and C#/F#/VB.NET project files efficiently with the OctoLinker browser extension for GitHub
YARP 8,625 about 1 month ago YARP is a reverse proxy toolkit for building fast proxy servers in .NET using the infrastructure from ASP.NET and .NET
JSON Formatter and Validator A blazing fast JSON formatter and validator that won't share JSON with a server
CSharpier 1,441 about 1 month ago An opinionated code formatter for c# that is based on the printing process
UnitsNet 2,679 about 1 month ago Makes life working with units of measurement just a little bit better
Another Redis Desktop Manager 30,995 about 1 month ago A faster, better and more stable redis desktop manager [GUI client], compatible with Linux, Windows, Mac. What's more, it won't crash when loading massive keys
OctaneEngine 237 about 2 months ago A high performance multipart downloader with many features such as pause/resume support, asynchronous progress, and throttling

Chat / Trading

Lean 10,065 about 1 month ago Lean Engine is an open-source fully managed C# algorithmic trading engine built for desktop and cloud usage
StockSharp 7,409 about 1 month ago Trading and algorithmic trading open source platform (stock markets, forex, bitcoins and options)

Chat / UI Automation

Atata 492 about 1 month ago Automated web testing full featured framework based on Selenium WebDriver
Managed Windows API Introspect and automate third-party Windows / VC++ applications without needing its source code
FlaUI 2,308 about 1 month ago FlaUI is a .NET library which helps with automated UI testing of Windows applications (Win32, WinForms, WPF, Store Apps, ...)
PuppeteerSharp 3,450 about 1 month ago Puppeteer Sharp is a .NET port of the official Node.JS Puppeteer API
PuppeteerSharp.Contrib 82 about 1 year ago Contributions to Puppeteer Sharp that provides a convenient way to write readable and robust browser tests

Chat / Visual Studio Plugins

EFCore.Visualizer View Entity Framework Core query plan directly in Visual Studio
Web Essentials 49 almost 4 years ago Web Essentials extends Visual Studio with lots of new features that web developers have been missing for many years
VsVIM 3,668 7 months ago VIM in Visual Studio
Nuget Package Manager NuGet is the package manager for the Microsoft development platform including .NET
SideWaffle 657 almost 5 years ago A collection of Item Templates for Visual Studio 2012/2013/2015 that makes any web developer's life much easier
Resharper Developer Productivity Tool for Visual Studio
CodeContracts 884 over 6 years ago Source code for the CodeContracts tools for .NET
Git Diff Margin 291 12 months ago Displays live Git changes of the currently edited file on Visual Studio margin and scroll bar
Productivity Power Tools A set of extensions to Visual Studio Professional (and above) which improves developer productivity
Tabs Studio Visual Studio tab manager with multiple tab rows, tab coloring and tab grouping
VSColorOutput Color highlighting for Build, Find and Debug output windows. Custom match patterns and colors can be added
CodeLineage Easy access to a cumulative diff view between file revisions (supports svn, git, mercurial, perforce)
OzCode OzCode is a Visual Studio Extension which cuts down on debugging time and increases productivity by detecting and isolating bugs, making them easy to fix
ViEmu very powerful Vi/vim emulator for Visual Studio supporting all basic and many advanced features of vi/vim
Roslynator 3,130 about 1 month ago A collection of 500+ analyzers, refactorings and fixes for C#, powered by Roslyn
Unchase.Odata.Connectedservice 45 over 2 years ago A Visual Studio Connected Service for generating API client code in C# or VB for OData web service
Unchase.OpenAPI.Connectedservice 109 over 1 year ago A Visual Studio 2017/2019 extension to generate C# (TypeScript) HttpClient (or C# Controllers) code for OpenAPI web service with
SonarSource.sonarlint-visualstudio 468 about 1 month ago SonarLint is a free, open source Visual Studio 2017, 2019 and 2022 extension that provides on-the-fly feedback to developers on new bugs and quality issues in C#, VB.NET, C/C++, TypeScript and JavaScript

Chat / Web Browsers

CefSharp 9,903 about 1 month ago HTML5, CSS3 and JS web browser powered by Chromium, for WinForms and WPF
SharpBrowser 901 over 1 year ago A full featured .NET web-browser built using C# and CefSharp

Chat / Web Frameworks

ASP.NET MVC ASP.NET is a free web framework for building great web sites and applications
Coalesce 66 about 1 month ago Coalesce is a framework for rapid-development of ASP.NET Core web applications
CodeBehind Framework 63 about 1 month ago Modern and powerful back-end framework under ASP.NET Core
FubuMVC 428 9 months ago A front-controller style MVC framework for .NET
NancyFx 7,149 almost 4 years ago Lightweight, low-ceremony, framework for building HTTP-based services on .NET and Mono
IISNode 1,856 7 months ago Host Node.js applications in IIS
Suave.IO Framework/library/web server that makes you cry tears of joy after finishing your project ahead-of-time when you look at the beautiful code you've written in F#
DotVVM 754 about 1 month ago MVVM framework for people who don't like to write JavaScript, with OWIN and ASP.NET Core support and a free extension for Visual Studio 2015 and 2017
Giraffe 2,136 about 1 month ago Functional (F#) ASP.NET Core micro framework for building rich web applications

Chat / Web Servers

EmbedIO 1,478 over 1 year ago Web server built on Mono and cross-platform
GenHTTP 205 about 1 month ago A lightweight, embeddable web server for quickly creating REST APIs
SimpleW 24 3 months ago Simple Web Server, build your RestAPI, fast, lightweight and cross-platform
XSP 195 almost 4 years ago Mono's ASP.NET hosting server. This module includes an Apache Module, a FastCGI module that can be hooked to other web servers as well as a standalone server used for testing (similar to Microsoft's Cassini)

Chat / WebSocket

Fleck 2,311 7 months ago Fleck is a WebSocket server implementation in C#. Branched from the Nugget project
SignalR 9,216 3 months ago Library for ASP.NET developers that makes it incredibly simple to add real-time web functionality to your applications
SuperSocket 3,958 about 1 month ago SuperSocket is a light weight extensible socket application framework
Websocket-Sharp 5,759 about 2 months ago A C# implementation of the WebSocket protocol client and server
WebSocket4NET WebSocket client for .NET 2.0+, Xamarin, Mono, Silverlight, Windows Phone, & WinRT
Crossertech Provides a great set of tools for you to build real-time applications on the Microsoft.NET plattform and much more
WampSharp 384 over 1 year ago A C# implementation of - a protocol that provides messaging patterns of Remote Procedure Calls and Publish/Subscribe over WebSockets
NetGain 929 about 6 years ago A high performance WebSocket server library powering Stack Overflow
Websockets.PCL 98 over 5 years ago WebSockets.PCL is a portable class library, profile 259, C# WebSocket implementation
Websocket.Client 701 7 months ago A multiplatform wrapper over native C# class ClientWebSocket with built-in reconnection and error handling

Chat / Windows Services

TopShelf 3,584 about 3 years ago An easy service hosting framework for building Windows services using .NET

Chat / WPF

DeftSharp.Windows.Input 77 2 months ago A simple keyboard/mouse event handler for Windows UI applications (WPF, MAUI, Avalonia)
Data Grid Extensions 834 10 months ago Modular extensions for the WPF DataGrid control, like filtering, additional column events, extended star-size column behavior, and more
Extended WPF Toolkit™ 3,912 5 months ago A rich collection of controls, components and utilities for creating WPF applications
WPF 7,125 about 1 month ago WPF is a .NET Core UI framework for building Windows desktop applications

Chat / Parser Library

Sprache 2,374 9 months ago A simple, lightweight library for constructing parsers directly in C# code
Pidgin 931 about 2 months ago A lightweight, fast and flexible parsing library for C#, developed at Stack Overflow
FParsec 532 about 1 year ago A parser combinator library for F#
Superpower 1,100 4 months ago A C# parser construction toolkit with high-quality error reporting
CSLY 377 about 1 month ago A light embedded C# lexer/parser generator
Parakeet 72 about 1 month ago A recursive descent parsing library with operator overloading for C#

Chat / Source Generator

CodegenCS 263 4 months ago Code Generation Toolkit where templates are written using plain C#. Command-line tool, MSBuild task, Visual Studio Extension, and Roslyn Source Generator
M31.FluentAPI 103 3 months ago Effortlessly generate fluent APIs for your C# classes
Supernova.Enum.Generators 181 3 months ago A C# source generator to create an enumeration class from an enum type. With this package, you can work on enums very, very fast without using reflection

Other Lists

List of Automated Testing Tools and Frameworks for .NET 553 about 1 month ago List of Automated Testing (TDD/BDD/ATDD/SBE) Tools and Frameworks for .NET
.NET-libraries-that-make-your-life-easier 819 11 months ago Open Source .NET libraries that make your life easier
awesome-LINQ 401 about 6 years ago A curated collection of awesome LINQ libraries, tools, and more
awesome-analyzers 540 about 1 year ago A curated list of .NET Compiler Platform ("Roslyn") diagnostic analyzers and code fixes
C# Algorithms, Data Structures 5,971 over 1 year ago A list of algorithms and data structures implementations
Awesome .NET Core 20,065 5 months ago A collection of awesome .NET core libraries, tools, frameworks and software
ASP.NET Core Library and Framework Support 211 about 3 years ago A list of what .NET libraries and frameworks are currently supported by ASP.NET Core and .NET Core)
Awesome .NET Performance 3,161 4 months ago A curated list of awesome .NET Performance books, courses, trainings, conference talks, blogs and most inspiring open source contributors
awesome-ddd 11,343 5 months ago A curated list of Domain-Driven Design (DDD), Command Query Responsibility Segregation (CQRS), Event Sourcing, and Event Storming resources
Awesome Unity 6,696 8 months ago A categorized community-driven collection of high-quality awesome Unity assets, projects, and resources
Awesome Xamarin 1,862 over 1 year ago A collection of interesting libraries/tools for Xamarin mobile projects
Awesome Roslyn 673 about 1 year ago A curated list of awesome Roslyn books, tutorials, open source projects, analyzers, code fixes, and refactorings
.NET Open Source Developer Projects 14,453 6 months ago This community maintained list showcases .NET open source projects that are useful for any aspect of the development process
Awesome Microservices .NET Core 2,811 3 months ago A collection of awesome training series, articles, videos, books, courses, sample projects, and tools for Microservices in .NET Core
dotnet-console-games 865 8 months ago Game examples implemented in .NET console applications
extra-awesome-dotnet 32 10 months ago Sorted lists of awesome .NET repositories, with counts of stars, issues, and forks!

Resources

Discover .NET Awesome .NET open source and community resources
NuGet Trends Check out NuGet packages adoption and what's trending on NuGet
Weekly C# Digest Weekly email newsletter with manually curated top 5 links from the .NET community
ASP.NET Core Developer Roadmap A complete guide to become a ASP.NET Developer

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