Game framework on top of Python, Panda3D and Twisted
Tween for Torque
Game engine supporting many 3D/2D formats and graphic effects
A cross platform 3d c++ game engine
The Lambda-Engine is a cross platform game engine.
A DirectX based graphics/physics engine
Realmcraft Download (on Engine001.com)
A 3D multiplayer RPG based in the world of Khoras.
Free and open source FPS based on Quake III Arena
Reference implementation for the Doom game engine.
fiftyfifty is a programming language and game
C++ command line application
Cross-platform 2D gaming middleware