A free 3D game engine to create games and realtimes scenes for Windows
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Pycraft is an open-source, OpenGL based game made in Python
3D-Accelerated open-source DOOM engine
Perl bindings to the Modern OpenGL API
3D game engine for C and C++
A graphics engine + toolkit.
Pear3DEngine is a modern and modular 3D development framework