Unity GitHub Repositories (2026) · Open Source Tools

🔓Unlock Among Us: cosmetics, account, chat and more!🎉

URDF Loaders for Unity and THREE.js with example ATHLETE URDF Files open sourced from NASA JPL

Unity MCP acts as a bridge between AI assistants and your Unity Editor. Give your LLM tools to manage assets, control scenes, edit scripts, and automate tasks within Unity.

A library for patching, replacing and decorating .NET and Mono methods during runtime

Godot/Unity3D System Design Architecture

Zero allocation LINQ with LINQ to Span, LINQ to SIMD, and LINQ to Tree (FileSystem, JSON, GameObject, etc.) for all .NET platforms and Unity, Godot.

Steamworks wrapper for Unity / C#

Toy Gaussian Splatting visualization in Unity

A simple and intuitive Audio Middleware for Unity

Lightning-fast and Zero Allocation Tween Library for Unity.

Open Brush is the open source, community led evolution of Tilt Brush! Forked from https://github.com/googlevr/tilt-brush

A community-driven touchscreen music game.

Open source Role Playing Game engine for Unity 3D written in C#.

Unity package for HybridCLR

C# modding swiss army knife, powered by cecil.

Get production-ready images, video, audio, and 3D from any AI agent: skills that pick the right model, price before spending, and keep characters and brands consistent through the Scenario MCP, plus expert teams that drive Blender, Maya, ZBrush, Unreal, and Unity.

A Unity extension for inspector enhancement and data serialization.

The open source Unity Dev Agent

Mod manager for universal game mods

Provides a service to install NuGet packages into a Unity project via the Unity Package Manager