Godot is a powerful cross-platform game engine
UCI chess engine
Xash3D FWGS engine
A certain block game
An open-source sandbox tower defense game
One framework for creating powerful cross-platform games
The game engine for everyone
A simple and easy-to-use library to enjoy videogames programming
Desktop/Android/HTML5/iOS Java game development framework
Open source HTML5 game framework that offers WebGL and Canvas
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Cocos simplifies game creation and distribution with Cocos Creator
RetroArch is a frontend for emulators, game engines and media players.
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
An open source reimplementation of the Among Us Server
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Home theater software and entertainment hub for digital media
Do virtual gear shifting (and more) in any rider app
A smart Ethernet switch for Earth
The source code to VVVVVV
Netcode that provides networking capabilities to GameObject workflows
Open source library for creative expression on the web, desktop, etc.
A dead simple 2D game engine for Go
Cross-platform game engine in Rust
New Godot bindings for Swift