A simple and easy-to-use library to enjoy videogames programming
Desktop/Android/HTML5/iOS Java game development framework
UCI chess engine
One framework for creating powerful cross-platform games
The source code to VVVVVV
Urho3D Game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
New Godot bindings for Swift
3D modeler, 3D game maker, 3D demo maker
Orx: Portable Game Engine
Examples of procedural geometry for Unity3D C#
2D Game Engine
Children's learning programming language Karel the Robot in 3D
Open-DIS implements the IEEE DIS protocol in multiple languages.
online 4X browser game engine
3D .NET engine for Windows, Linux, Mac
2D physics engine for games
Science Fiction, heavy assault, disestablishment of power.
A cross-platform OpenGL based lightweight scenegraph library
Cross-platform 2D game engine