awesome-c

C-based/Cached/Core Computer Vision library; modern computer vision

Portable, header-only ANN library in C99

FANN

Fast Artifical Neural Network library; an implementation of neural networks

Simple ANN in C89, without additional dependencies

KANN

Two-file ANN library

LibDEEP

Deep learning library

m2cgen

A CLI tool to transpile trained classic ML models into a native C code with zero dependencies

An Embedded Computer Vision & Machine Learning Library

b63

Light-weight micro-benchmarking tool for C

Also known as the GNU build system (automake, autoconf, libtool...) is one of the most widely used build systems (configure && make)

Autotools project skeleton

A simple autotools skeleton (template) to quickly bootstrap new projects

Cross-platform family of tools designed to build, package and test software

Tool which controls the generation of executables and other non-source files of a program

Extremely fast, user-friendly build system. Based on Ninja

Command-line utility which reads a scripted definition of a software project and uses it to generate project files for Visual Studio and GNU Make. Other targets are also being worked on

Software construction tool using Python

Cross-platform build utility

zproject

Project generator and build system support tool

Compiler cache designed to speed up recompilation

Compiler for LLVM. Supports C11

A C11 compiler using QBE as a backend

distcc

Program that allows builds to be distributed among several machines

Library that provides a graph-based intermediate representation, optimizations and assembly code generation suitable for use in compilers. Comes with an example C front-end under the same license

Provides a C compiler as part of its compiler set. Supports C11

Venerable compiler. Supports C99. , all open source

Extremely fast, multi-threaded, meta-compressor library. Various licenses, all open source

Brotli

General-purpose lossless compression algorithm library. Has speeds comparable to DEFLATE, but much higher compression ratios.

C version of the high-quality data compressor (LZMA implementation)

CRoaring

C implementation of

FiniteStateEntropy

Two highly efficient compression codecs optimized for modern CPUs

DENSITY

Super-fast compression library

heatshrink

Data compression/decompression library for embedded and real-time systems

fast_zlib

Improved zlib, which runs 2 to 10 times faster

fastLZ

Lightning-fast lossless compression library (LZ77 type). Embbedable on small target like ARM Cortex-M families. Source code directly embbedable on your project ( a pair of h/c files), no dynamic memory allocation

huffandpuff

Minimal Huffman encoder and decoder. Public domain

libzip

C library for reading, creating and modifying zip archives

Patent-free, high-quality data compression library

Lizard

Formerly LZ5; an efficient compressor with fast decompression. Achieves compression ratios comparable with zip and zlib at decompression speeds of 1000MB/s and faster

Library for an extremely fast compression algorithm

Fast data compression library

pixz

Parallel, indexed xz compressor

Compressor for small text strings

SIMDComp

Simple library for compressing lists of integers using binary packing. Makes use of SIMD instructions on x86

smaz

Efficient string compression library

squash

Compression abstraction library, complete with some utilities

TurboPFor

Fastest integer compression

TurboRLE

Most efficient run-length encoding

zip

Really really small zip archive processing library

Massively spiffy yet delicately unobtrusive compression library

libarchive

libarchive is a portable, efficient C library that can read and write streaming archives in a variety of formats

zlib-ng

Zlib replacement with optimizations for 'next-generation' systems

Fast, lossless compression algorithm, targeting real-time compression scenarios at zlib-level or better compression ratios

Small library for channel constructs for inter-thread communication. Public domain

checkedthreads

A simple library for parallelism, with built-in checking for race conditions

Concurrency primitives, safe memory reclamation mechanisms and non-blocking data structures

First-come first-served Readers/Writers lock for POSIX threads

Libaco

A blazing fast and lightweight C asymmetric coroutine library

libconcurrent

Concurrent programming library, using coroutines, for C11

libcsp

High performance concurrency C library influenced by the CSP model

Library which makes structured concurrent programming easy

libhl

Library implementing a thread-safe API to manage a range of data structures. Also provides some supporting functions and structures for concurrent and lockfree programming

Data synchronization library, which scales linearly with the number of cores

Go-style concurrency

oclkit

Two-file OpenCL wrapper

OpenCL Mid-Level Abstractions

Set of pragmas designed to allow for easy parallelization of code. Standard (licensing not applicable)

Open MPI

Message passing interface implementation

pal

Optimized library for maths, parallel processing and data movement

Portable implementation for non-preemptive priority-based scheduling for multiple threads of execution

POSIX thread library. Standard (no license applicable)

Portable, small implementation of the C11 threads API

Implementation of the Simple Authentication and Security Layer and a few common SASL mechanism

Secure communication library, implementing SSL, TLS and DTLS

General-purpose cryptography library, with a range of available ciphers

Implementation of the SSL and TLS protocols. Also includes a cryptography library.

Library for quantum-resistant cryptographicl algorithms

Modern and easy-to-use crypto library

Fairly comprehensive, modular and portable cryptographic toolkit. Public domain

Another crypto implementation

MIRACL

Multiprecision Integer and Rational Arithmetic Cryptographic Library; an SDK for elliptic curve cryptography

Collection of hash functions, ciphers, tools, libraries and materials related to cryptography and security. Public domain

s2n

C99 implementation of the TLS/SSL protocols, designed to be simple, fast and with security as a priority

Set of implementations of various hash functions, including several cryptographic ones

trezor-crypto

Heavily optimized crypto algorithms for embedded devices

bfish

A single include ANSI-C Blowfish ECB crypto library. Public domain

Library for a high-performance embedded database for key-value data

Fast in-process analytical database, with C API

Embeddable JSON Database engine

Groonga

Columnar store with full-text search

Hiredis

Minimalistic client library for Redis

High-performance client library for

Ultra-fast, ultra-compact key-value embedded data store

MySQL

The world's most popular open source database

Powerful object-relational database system

Advanced key-value store

Modern, embeddable key-value database

sparkey

Simple constant key/value storage library. Designed for read-heavy loads with infrequent, large bulk inserts

Self-contained, serverless, zero-configuration, transactional SQL database engine. Public domain

Self-contained, serverless, zero-configuration, transactional NoSQL engine

WhiteDB

Lightweight database library, operating entirely in main memory

FlashDB

An ultra-lightweight database that supports key-value and time series data

TDengine

High-performance, cloud native time-series database

C-Macro-Collections

Generate simple and generic data structures using macros

CLIST

Simple and lightweight implementation

Collections-C

Library of generic data structures

ds

Common Data Structures and Algorithms

A graph processing library

kdtree

Simple library for working with KD-trees

Library containing a range of self-balancing binary trees

A small, portable, MACRO-less library for basic data structures (list, set, map, queue...) in C (C++ backend)

Portable lock-free data structure library. Public domain (more exactly, whatever license you want)

Soft and hard real-time data structures.

list.h

Implementations for singly linked and doubly linked list functions

M*LIB

Library for generic, but typesafe C containers. Implemented as header-only

offbrand

Collection of generic, reference-counted data structures

PackedArray

Random-access array of tightly packed unsigned integers of any desired width. Has a SIMD-optimized implementation

Red-Black tree. Exposes almost all implementation primitives, so can be used for scenarios like augmentation, multiple compatible ordering functions, and more

Single-file hash table implementation

vector.h

Header library for typed lists

Tool that takes a large C file with a property of interest and automatically produces a much smaller C file that has the same property. Intended to help create minimal bug-demonstrating cases in complex code

C Bounded Model Checker; a tool for verification of array bounds, pointer safety and user-specified assertions

Analyzes a collection of source files and prints a graph charting control flow in the program

Tool for measuring the complexity of source code

Source code analyzer and refactoring browser for C programs

Graphical front-end for a range of command-line debuggers

debug

One-header library for easier 'printf debugging'

Efficient SMT-based Bounded Model Checker; a tool for verification of single and multithread programs, user assertions, overflow, and pointer/memory safety

GNU Project debugger

LLVM debugger

Debugger that records non-deterministic executions to allow for deterministic debugging

Range of dynamic analysis tools, including a leak checker

Generates documentation in either LaTeX, HTML, RTF or SGML

Modestly tagged markup language that can be used to generate a range of formats

De-facto standard tool for generating documentation from annotated sources. Can generate a large range of formats

GNOME IDE

Extendable, configurable IDE supporting C

Cross-platform IDE

Small and fast IDE

KDE IDE

Simple, lightweight and feature-rich IDE

Embeddable Javascript engine with a focus on portability and compact footprint

MetaCall

Cross-platform Polyglot Runtime which supports NodeJS, JavaScript, TypeScript, Python, Ruby, C#, Wasm, Java, Cobol and more

Apache Portable Runtime; another library of cross-platform utility functions

Collection of common algorithms and data structures

The Common Pipeline Library; a set of libraries designed to be a comprehensive, efficient and robust software toolkit

Large collection of useful data structures and functions. Various licenses, all open source

Library of utility functions and structures, designed to be portable, efficient and powerful

Small and lightweight implementations of common algorithms and data structures

Utility functions and structures, designed for resource-constrained systems. Can be embedded

libnih

Lightweight library of functions and structures

Small library of basic utilities, including memory allocation, string manipulation and logging

Large library of utilities, featuring data structures, among other things

plibsys

Cross-platform system C library. Zero third-party dependencies, uses only native system calls

Simple and powerful library, designed as a replacement for GLib while focusing on being small and light

sc

Common libraries and data structures for C

TBOX

Multi-platform library with a large number of capabilities

pspsdk

An open-source SDK for PSP homebrew development.

Cross-platform, video game development and multimedia library

AssetKit

🎨 3D asset importer/exporter/util library based on COLLADA/glTF specs

astera

C99 Cross Platform 2D Game Library

cglm

📽 Optimized OpenGL/Graphics Math (glm) for C

Fast and lightweight 2D game physics library

cmt

🎮 C Bindings/Wrappers for Apple's METAL Graphics Framework

Corange

Game engine in pure C

Binding for

Modified version of the Quake2 engine

Epoxy

Library for handling OpenGL function pointer management

exengine

3D game engine in C99 with a starting template

Flecs

A Multithreaded Entity Component System written for C89 & C99

Freecell Solver

Set of libraries and command-line programs for automatically solving FreeCell and some similar variants of card Solitaire

Alternative to the OpenGL Utility Toolkit. Allows the creation and management of windows with OpenGL contexts

Multi-platform library for creating windows with OpenGL contexts

Quake3 engine, freed at last

kazmath

Maths library for games

Cross-platform audio library with a wide variety of outputs

librg

Pure C99 game networking library for building simple and elegant cross-platform multiplayer client-server solutions

MATHC

Math library for 2D and 3D programming

Portable, lightweight, plugin-based, data-driven, 2D-oriented game engine

Quake

Quake engine

Quake2

Quake2 engine

Simple and easy-to-use library to learn video game programming

RetroArch

Reference frontend for

Cross-platform library designed to provide low-level access to audio, keyboard, mouse, joystick and graphics hardware via OpenGL

sdl-gpu

Library for high-performance, modern 2D graphics. Based on SDL

Sound, Input and Graphics Integration Library; a simple alternative to other libraries for doing all those things. Various licenses, all open source

uastar

Minimal A* implementation

AssetKit

🎨 3D asset importer/exporter/util library based on COLLADA/glTF specs

2D graphics library. or

cmt

🎮 C Bindings/Wrappers for Apple's METAL Graphics Framework

Library for reading and writing gif images

Thin layer of graphical data types

heman

Tiny library of image utilities dealing with height maps, normal maps, distance fields and the like

libcaca

ASCII renderer for terminal-based interfaces

libgd

Library for the dynamic creation of images by programmers

Small, portable library for high-quality conversion of RGBA images to 8-bit indexed colour images

Faster library for reading and writing JPEG files.

Official PNG reference library

Library to render SVG files using Cairo

libsixel

Library implementing the SIXEL protocol, allowing beautiful graphics in your terminal

A simpler interface for reading and writing PNG files

Image processing library

Function library for rasterizing 2D vector graphics

lightmapper

Single-file library for lightmap baking, using an existing OpenGL renderer. Public domain

A Color Management System. It provides fast transforms between ICC profiles

mozjpeg

Improved JPEG encoder

nanovg

Anti-aliased 2D vector drawing library on top of OpenGL, for UI and visualizations

Industry standard for high-performance graphics, with a native C binding.

PlutoVG

A standalone 2D vector graphics library in C

SAIL

⛵ The missing small and fast image decoding library for humans (not for machines)

Cross-platform widget toolkit

Another cross-platform widget toolkit

microui

Tiny immediate-mode UI library written in portable ANSI C

Professional SDK to build cross-platform desktop applications using C

nuklear

Small, C89, single-header widget toolkit. Public domain

Single-file library for simple dialogs. Compatible with many other toolkits and OSes

Basic widget toolkit. Part of Tcl/Tk

Widget toolkit designed for the XWindow system

embedded GUI with easy-to-use graphical elements, beautiful visuals and a low memory footprint

luigi

A barebones single-header GUI library for Win32, X11 and Essence

CLHash

Library implementing the ridiculously fast CLHash hashing function. Only works on Intel Haswell or newer

HighwayHash

Fast, strong, SIMD-using hash function. Also contains an implementation of SipHash (although this is slower)

SpookyHash

Extremely fast hash function

t1ha

Fast Positive Hash - a portable, fast hash function

Extremely fast hashing algorithm. Comes in 32 and 64-bit varieties

tinyc.game

Tiny C games you can compile and run RIGHT NOW

(a little dated, but most of it is still valid and useful)

(online PDF)

(video)

(for the OpenMP3 standard)

Full reference book for C99

Concise reference book for C11

Concise reference book for C99

Original book on C, by its creators

Complete tutorial on programming in C11

Excellent book to learn the basics of C

'Head-first' style book for learning C

Good programming book on C

In-depth resource on pointers in C

Book for using ZeroMQ with C

Interesting, in-depth and entertaining look at the innards of C

In Modern C, Third Edition you’ll learn to harness C’s full potential using the latest tools and techniques

flex

Fast lexical analyzer generator

General-purpose parser generator that converts an annotated context-free grammar into a range of parsers

hammer

Parser combinators for binary formats

mpc

Parser combinator library

owl

A parser generator for visibly pushdown languages

Lexer generator, producing fast lexers, with access to its internals. Public domain

Garbage collection for C. Various licenses, all open source

Malloc implementation that emphasizes avoidance of fragmentation and scalable concurrency support

Efficient memory allocator

libcsptr

Smart pointers for C

rpmalloc

Thread-caching, fast memory allocator, naturally aligned on 32-byte boundaries. Public domain

Hierarchical, reference-counted memory pool system with destructors

Two-Level Segregated Fit allocator; a general-purpose, dynamic memory allocator designed to meet real-time requirements.

aubio

Library for audio and music analysis

Complete, cross-platform solution to record, convert and stream audio and video

Framework for audio and visual media

Music-playing library

Library for reading and writing sound files. Supports many formats. or

Library for cross-platform, real-time audio input and output. Has a range of back-ends

Complete multimedia library for audio and video encoding, decoding, playing and streaming

Simple PNG image decoder and encoder, requiring no other dependencies

minimp3

Lightweight MP3 decoder single header library

Lightweight music DSP library

Compiler of ASN.1 specifications into C source code

CHL

C Hypertext Library - A library for writing web applications in C

High-level binding for ZeroMQ

Dyad.c

Lightweight, easy, asynchronous networking library

Advanced, easy-to-use, asynch-capable DNS client library and utilities

gumbo-parser

HTML5 parsing library in C99

A new-generation HTTP server

HTTP request/response parser

Library to simplify DNS programming

Client-side URL transfer library, supporting a wide range of formats

Mail library providing an efficient network for IMAP, SMTP, POP and NNTP

Yet another event loop

Event loop replacement for network servers

Library to add basic web server capabilities to an application or embedded device

libhv

Cross platform event loop library

Implementation of the Stringprep, Punycode and IDNA specifications

Small library that makes it easy to run an HTTP server as part of another application

is a collection of libraries to provie APIs to the Netlink protocol (replacement for ioctl). It's primary use is to communicate with the Linux kernel, to modify networking state (interfaces, routing etc...)

HTTP server library, designed to be easy to use

libpcap

API provides to various kernel packet capture mechanism

Library intended to give developers a way to send email from their applications. Supports multiple To/Cc/Bcc recipients and attachments without size limits

Library for cross-platform HTTP servers

libuhttpd

A very flexible, lightweight and fully asynchronous HTTP server library based on libev and http-parser for Embedded Linux

LibVNCServer

Cross-platform libraries to implement VNC server and/or client functionality

Easy-to-use and powerful web socket library

libzmq

Core ZeroMQ library, a high-performance asynchronous messaging library, aimed at use in distributed or concurrent applications. C API (backend C++) with static linking exception

Experimental, scalable, high-performance HTTP server

Embedded web server

MQTT-C

A portable MQTT C client for embedded systems and PCs alike

nanomsg

C-based implementation of ZeroMQ

nanomsg-next-generation - lightweight brokerless messaging

SIP implementation without additional dependencies

silgy

Asynchronous HTTP(S) engine for C/C++ projects

socket99

C99 wrapper for the BSD sockets API

twitc

Mini library for interacting with the Twitter OAuth API

Strictly RFC 3986-compliant URI parsing and handling library

WebSocket library. Implements version 13 of the WebSocket protocol, as described in RFC 6455

zyre

Framework for proximity-based peer-to-peer applications

Library for statistical and scientific computing

Arb

Library for arbitrary-precision interval arithmetic

Automatically Tuned Linear Algebra Software

clBLAS

BLAS functions written in OpenCL

Math library with a great variety of mathematical functions with CMake build support. Seeks to be close to C89/C90 compliant for portability

Library for multidimensional numerical integration

fft-c

A high-performance Fourier Transform from netlib's fftpack; wrapped in a user-friendly format

The Fastest Fourier Transform in the West; a highly optimized fast Fourier transform routine

Fast Library for Number Theory; a library supporting arithmetic with numbers, polynomials, power series and matrices, among others

GNU Linear Programming Kit; a package designed for solving large-scale linear programming, mixed integer programming and other related problems

GNU Multple Precision Arithmetic Library; a library for arbitrary-precision arithmetic. or

Library for complex number arithmetic

Library for arbitrary-precision floating-point arithmetic

Portable mathematics library for multi-precision rational interval arithmetic

The GNU Scientific Library; a sophisticated numerical library.

Simple fast Fourier transform library

Interface to

Portable, number-theoretic, multiple-precision integer library. Supports algebra, digit manipulation, modular reductions, and various number-theoretic routines. Public domain

Polynomial-related maths library. Public domain

Computer algebra system for number theory; includes a compiler to C

Suite of data structures and routines for scalable parallel solution of scientific applications modelled by partial differential equations

SCS

Splitting Conic Solver; a numerical optimization package for solving large-scale convex cone problems

Library for the solution of large, sparse eigenvalue problems on parallel computers

Set of optimized maths operations (in assembly), suitable for cryptographic use. Public domain

Fast, SIMD-optimized mathematical library

gperftools

Collection of utilities for measuring and improving performance

Performance analysis tool. Part of GNU binutils

Statistical profiler for Linux. Can profile any code (including the kernel!) with low overhead and without recompilation

Linux kernel-based profiler with a lot of functionality

pdfio

PDFio is a simple C library for reading and writing PDF files

Onigmo

Fork of Oniguruma, supporting more advanced regexps

Oniguruma

Regex library supporting a wide range of encodings, and incorporating many security-oriented fixes

Implementation of regexes identical to that of Perl 5

SLRE

Super Light Regular Expression library; a small implementation of a subset of Perl regex syntax

TRE

POSIX-compliant, feature-full regex library

binn

Binary serialization format, meant to be compact, fast and easy-to-use

c-capnproto

Implementation of the Cap'n Proto serialization protocol

cmp

Implementation of the serialization protocol

flatcc

compiler and library

Implementation of the Avro data serialization system

mpack

Another implementation of the serialization protocol

Object Persistence in C; a revolutionary serialization framework, with matching on-disk and in-memory representations

protobuf-c

Implementation of Google Protocol Buffer

tpl

Small binary serialization library

External Data Representation; a standard for data serialization. Standard (no license applicable)

pbtools

Google Protocol Buffers C source code generator

Modelled after Perl's CPAN, this is a big collection of code that does stuff. The full list is . Various licenses, all open source

clib

Something of a package manager. Comes with a

Collection of common GNU code. Various licenses, all open source

Collection of libraries doing various things. (Apparently) public domain

mmx

Collection of single-header libraries. Various licenses, all open source

par

Bunch of single-file libraries

Snippets

Useful code snippets and header-only libraries. Public domain

stb

Range of single-file libraries. Public domain

tinyheaders

Collection of header-only libraries, primarily oriented toward game development

zpl

C99 cross-platform header-only library with many goodies. [ , ][BSD-3-Clause, Unlicense]

Bionic

Google's standard library, developed for Android

cloudlibc

Standard library based on the concept of

Standard library designed for the smallest possible binaries

The GNU C Library; an implementation of the standard library.

Standard library, compatible with POSIX 2008 and C11. Designed for static linking

The Public Domain C Library. Implements most of C99 and some of C11

Small C library for developing embedded systems

CTL

C CONTAINER TEMPLATE LIBRARY (CTL)

The Better String Library

International Components for Unicode; a library for Unicode support

levenstein.c

algorithm implementation.

Library for manipulating Unicode strings

Text conversion library

librope

UTF-8 rope ('heavy' string) library

SDS

Simple Dynamic Strings; a library for handling strings in a simpler way, but one that is compatible with normal C string functions. Available via

stmr.c

algorithm implementation

str

Yet another string library for C language

StringZilla

Up to 10x faster SIMD and SWAR-accelerated string search, sort, hashes, edit distances, alignments, and generators

utf8.h

Single-header UTF-8 library, designed to mimic C-style string functions. Public domain

utf8proc

Library for processing UTF-8 data

libcsv

Simple, streaming CSV parser

Library for encoding, decoding and manipulating JSON

jfes

JSON For Embedded Systems; simple JSON engine without any dependencies

Minimalistic JSON parser

json

Simple, low-memory-use JSON parser

json-c

Easily work with JSON in C. Comes with a reference-counted object model, and aims for conformance with

json.h

Single-file non-streaming JSON parser

parson

Two-file, C89-compatible JSON parser

WJElement

Advanced JSON manipulation library, with support for JSON Schema. or or

Fast streaming JSON parser library

inih

Small and simple INI file parser, good for embedded systems

iniparser

Parser for .ini files

Yet another INI parser

minIni

Small and portable INI parser

libbson

BSON utility library

libcbor

: CBOR protocol implementation for C and others

libconfuse

Small configuration file parser library

libelf

Simple library for parsing ELF files

libucl

Universal configuration library parser

libxo

Allows an application to generate plain text, XML, JSON and HTML output using a common set of function calls. The application decides at runtime what output style should be produced

Stream-oriented XML parser

Standards-compliant, portable XML parser

xml

Simple, low-memory-use XML parser / tokenizer

YAML 1.1 parser and emitter

libsigrok

signal analysis software suite that supports various device types (such as logic analyzers, oscilloscopes, multimeters, and more). [ ][GPL]

CHEAT

Simple unit testing framework

Unit testing framework

A modern minimal hassle unit test framework

clar

Clear and simple unit testing framework

Mock/stub generator

Unit testing framework with support for mock objects

KISS, non-intrusive test framework

ctest

Yet another unit testing framework

Another unit testing framework

greatest

Unit testing library in one file, with no memory allocation

minctest

Unit testing microlibrary

Small unit testing framework

Nala

A test framework for C projects

Rexo

Framework for C89/C++ featuring automatic registration of tests and a polished API

Tau

A Micro Unit testing framework for C/C++ (~1k lines of code). Includes a rich set of assertion macros, supports automatic test registration and can output to multiple formats, like the TAP format or JUnit XML. Supported on Linux, macOS, FreeBSD, and Windows

theft

Property-based testing (similar to )

Simple unit testing framework

utest

Single-header unit testing library

Notepad++ autocompletion plugin. Works with all identifiers recognized by Ctags. This is a download link

Collection of Emacs Development Environment Tools; designed to provide IDE-like features to Emacs. Built-in

Flycheck

Modern syntax checking for Emacs. For C, it can use either GCC or Clang as a back-end

Neomake

Async :make and linting framework for Neovim/Vim

Syntastic

Syntax checking and linting for Vim

Emacs code template system, with C templates for common snippets

YouCompleteMe

Code completion engine for Vim

Fast and small automatic source code formatter that supports C

address-sanitizer

Fast memory error detector

A byte array generator to import binary files directy from C in the spirit of xxd

c

Compile and execute C "scripts" in one go on the command line. Also has shebang support

c99sh

Run C files using hash-bang

Online service to translate C declarations into English and vice versa. Public domain

Graphs include dependencies in a project using Graphviz. or or

Static analysis tool, designed to work with Clang

Something of a package manager for C.

Static analysis tool. Despite the name, works well with C

RAD tool to enable quick development of GTK+ GUIs

GNU Make Standard Library; a collection of additional functionality for GNU Make

Source code tagging tool

General-purpose preprocessor. More versatile than the C preprocessor, but more flexible than m4

Converts source code to formatted text with nice highlighting

include-what-you-use

Helps find unecessary inclusions and make suggestions for fixing them. Based on LLVM/Clang (and only works with it)

incbin

Include binary files in your C/C++ applications with ease

Formats C source code automatically to make it easier to read. Also converts from one style of source to another

SMACK

Modular software verification toolchain and a self-contained software verifier. Currently only works with programs compiled using Clang

Removes #ifdef and #if directives with their delimited text without touching any other part of the file. or

ApeTagLibs

Library for working with APEv2 tags

argparse

Command-line argument parsing library, inspired by Python's argparse module

Commands for manipulating filesystem extended attributes

Library for manipulating binary object files. Part of GNU binutils

Caffeine

Library for building daemons and services for Linux and FreeBSD systems

Implementation of exceptions

CommonMark

Implementation of the CommonMark spec

cosmopolitan

fast portable static native textmode containers (build C programs for Linux\Mac\Windows in one go)

cpu_features

Get CPU features at runtime.

Checkpoint/Restore In Userspace; a software tool (with a C API) for 'freezing' a running application to disk, then restoring it. or

Simple way for applications to talk to one another. or

Simple implementation of a Markdown parser

dlx

Implementation of , with example solvers

docopt.c

Implementation of a command-line option parser

Another foreign function interface library

In-band and out-of-band IPMI implementation

Perfect hash function generator, given a list of strings. Outputs C code

Collection of libraries for building foreign function interfaces

Hoedown

Fully standards-compliant, extension-supporting, UTF-8 aware, fast Markdown parser

Efficient, general-purpose framework for dynamic software updating

Library introducing higher-level programming to C

libcmark

Library for parsing the CommonMark dialect of Markdown

libcoap

Implementation of the . or

Library which permits cross-platform system calls and standard utilities across different operating systems

libffi

Portable foreign-function interface library

libgeohash

Pure C implementation of the Geohash algorithm

Portable implementation of the Git core methods, provided as a re-entrant linkable library.

Generic Security Service

libimobiledevice

Cross-platform protocol library to communicate with iThings

libnfc

Platform-independent Near-Field Communication library

libpostal

Library for parsing and normalization of street addresses around the world. Powered by statistical NLP and open geo data

Implementation of network protocols for communicating with exchanges, dark pools and other trading venues. Supports FIX, FIX/FAST and many proprietary protocols

Provides generic access to USB devices

Cross-platform asynchronous I/O

libvldmail

Your friendly email validation library. No external dependencies (not even regexps)

linenoise

Small, self-contained alternative to readline and libedit

libXDGdirs

An implementation of XDG Base Directory Specification

Library for getting the types of a file

Coloured terminal UI library

netbsd-curses

Simplified and small version of ncurses, with the same interface

nope.c

Ultra-light software platform for scalable server-side and networking applications (think node.js for C programmers)

obj.h

A single-header supports OOP in pure C

parg

A single-file reimplementation of with better defaults

pbc

Protocol buffers library

progressbar

Easy-to-use library for displaying text progress bars

rabbitmq-c

Client library for

DSL for state machines that compiles to C

safe-remove utility for the command line that can purge items from your waste directories after x number of days

Rogueutil

Cross-platform library for creating text-based user interfaces (TUI)

sort

Collection of sorting routines, which type-specialize at compile-time with a user-defined type

termbox

Library for writing text-based interfaces

tinyexpr

Tiny recursive-descent parser, compiler and evaluation engine for simple mathematical expressions

tm

⏱ Timer and Timeline Utils for C

Library of functions for technical analysis of financial data

whereami

One-file library for locating the current executable on the file system

Cross-platform library for reading and writing .xlsx files

xlsx_drone

Fast Microsoft Excel's *.xlsx reader

Reliable, pure C logging library

zproto

Protocol framework for ZeroMQ

Metalang99

Full-blown preprocessor metaprogramming

Datatype99

Algebraic data types for C99

EasyLogger

An ultra-lightweight, high-performance C/C++ log library

Concord

A Discord API wrapper library written in C

Mini-framework for web applications. Includes a fast HTTP and Websocket server, and also supports custom protocols

CGI and FastCGI library for C

Fully featured, multi-platform, web application development framework, targeted especially at embedded systems and appliances

Easy-to-use web application framework for writing scalable web APIs in C

Designed to emulate a POSIX-compatible environment extensively under Windows.

Minimalist environment for C development on Windows with 64 bit support.

Minimal SYStem 2; aims to provide support for a POSIX environment on Windows, with a package manager based on Arch Linux's pacman. Packages have individual licenses, otherwise, as MinGW and Cygwin