Game engine supporting many 3D/2D formats and graphic effects
Arianne is an engine to develop multiplayer online games like Stendhal
Java Settlers
Event driven concurrent framework for Python
evolution for vegastrike SpaceSim/Combat/Trade game
AutoTeach makes kids study and learn in exchange for internet access.
An extensible development framework for roleplay games.
A game engine in java for 2D strategy games
Game framework on top of Python, Panda3D and Twisted
The Lambda-Engine is a cross platform game engine.
Atlarius is no longer under development.