scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Vivid3D is a C++ IDE/3D engine, with python scripting.
GemRB is a portable open-source implementation of the Infinity Engine
GameServer is a sophisticated, game server designed for online games
Urho3D Game engine
2D Game Engine
Character animation system for games and simulations.
Build Cross-platform Applications
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
An open source controller for Scalextric community
This is a hacking style game set in the early '80s
SuperWikia: The Runtime/Realtime Environment for Codesmiths
Delphi-like IDE for cross-platform game development
... the open-source glide computer