awesome-unity

Scripts for creating any type of 2D ropes in the editor or during runtime

Quickly create handcrafted 2D landscapes and levels

Pixel Camera 2D

A simple pixel perfect camera with scaling options for 2D Games

A skeletal animation editor with a Unity library

Takes your files and creates Unity prefabs from them that are easily placed into your Unity scene. Complex collision is supported through Unity’s PolygonCollider2D class

Advanced skeletal animation editor with support for both per-object and skinned mesh animation with an integrated in-editor skinning tool

An importer for maps

Augmented Reality SDK that includes libraries, utilities, and examples

Scripts and prefabs to help with the development of Google Daydream and Cardboard apps for Android and iOS

Scripts and Great examples to abstract the use of VR controller actions in Unity

Virtual Reality framework that allows for powerful interactions, locomotion, and visual effects

Augmented Reality SDK with image and object recognition, smart terrain and extended tracking features

Provides camera, controllers, and other effects for use in FPS games

CharacterController2D

A 2D controller that behaves very similarly to Unity's CharacterController component

Fungus

An easy to use Unity 3D library for creating illustrated Interactive Fiction games

Strange is a super-lightweight and highly extensible Inversion-of-Control (IoC) framework, written specifically for C# and Unity

Create maintainable games faster, better, more stable, and consistent than ever before

InControl

An input manager that tames makes handler cross-platform. controller input easy

InputBinder

Bind game inputs to methods via code or using the inspector to add event driven input handling to your project

TouchKit

Makes it easy to recognize gestures and other touch input

TouchScript

Makes handling complex gesture interactions on any touch surface much easier

A set of level design tools for building complex levels quickly inside Unity

Unity Ads is a video ad network with quick and seamless integration using regular and opt-in ads

Build social and realtime games with an open-source

Build networked games without having to know the details of networking or write any complex networking code

Plug and play cloud networking that also works for local hosting. Free for up to 20 concurrent users

A fast and simple way to save and load data on all major platforms supported by Unity

A customizable dynamic day and night weather system that creates realistic storms and weather

Provides a dashboard with metrics to help track active players, sessions, retention, and revenue

Tween any numeric property or field (including Vectors, Rectangles, etc.), plus some non-numeric ones (like strings). This is the follow-up to HOTween

GoKit

An open source, lightweight tween library aimed at making tweening objects dead simple

A simple, and easy to use animation system

FOSS, and also the most lightweight tweening library for Unity. Allows you to tween any value you have access to via the .value() method

A powerful UI system and event notification framework

A alternative to render text in uGUI by using the distance field technique, which allows crisp fonts at any scale. This was recently purchased by Unity and will be integrated into the engine in the future

Consolation

In-game debug console that displays output from

The new GitHub for Unity extension brings the GitHub workflow and more to Unity, providing support for large files with Git LFS and file locking

Easily group objects together

Scene View Bookmarks

Editor extension to bookmark and later recall scene views

Makes it easy to manage positions of assets in the scene with easy to use snapping tools and many more features to improve the scene creation workflow

Editor extension for merging scenes and prefabs, also integrates with VCS

UniRx

UniRx (Reactive Extensions for Unity) is a reimplementation of the .NET Reactive Extensions. Rx cures the "asynchronous blues" without async/await

Collection of miscellaneous open source scripts and helpers for Unity 5.0

Vimeo Unity SDK

Easily stream your Vimeo videos into Unity or record and publish out to Vimeo

Quickly make gameplay prototypes, A.I. behaviors, animation graphs, interactive objects, and more using finite state machines

Nodulus

A complete puzzle game with a clever twist. Play it online

Tips in gif form showing a few ways to use the editor more efficiently

Unity Labs' Super Science

Gems of Unity Labs for user education

Short videos showing some handy tips when using Unity

Using the stencil buffer in Unity to draw splatter effects on surfaces. This could be used for paint or blood splatter

This series of posts will introduce you to shader coding, and is oriented to developers with little to no knowledge about shaders

An great collection of general purpose game programming content

Tutorials designed for learning the C# scripting side of Unity

A short tutorial about removing the small gaps that sometimes appear between adjacent sprites

Lots of great game development patterns useful when making games with or without Unity

A video tutorial providing an in-depth explanation of Unity's new UI system

The official tutorials for scripting, animation, audio, and almost anything Unity related

Beginner and mid-level tutorials focused on learning Unity features or creating small example games

Official tutorials from Microsoft for creating Microsoft HoloLens applications

Unity's official documentation on developing virtual reality applications