Donation system for source-based communities
A graphics engine + toolkit.
Easily convert to MP4 with H264 and without all the codec hassle
Cross platform 2D game creation framework with Python bindings
Open source, moddable game engine for the "Polygon Love 2" game
A Wargame
Access to Irrlicht Engine SDK from assembler, C, Python, Basic, Pascal
A Dungeons & Dragons Miniature Game.
A free software engine simulation tool written in Python and PyQT
Game framework on top of Python, Panda3D and Twisted
The Lambda-Engine is a cross platform game engine.
Bruno's RAY Tracing Engine
Make games with Lego-like building blocks