The game engine for everyone
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free APK version of Garry's Mod, the Android sandbox physics game
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Character animation system for games and simulations.
Children's learning programming language Karel the Robot in 3D
Multi-threaded game engine for Android
Modern AS3 Game Engine
2D physics engine for games
Flickit is fun 2d physics arcade style game.