Map editor for the game Can I Scape
Toolkit for the easy prototyping of hybrid games for Tabletop Devices
Multimedia asset management and manipulator for Étoilé
Cross-platform C framework very compact libraries and tools.
AutoTeach makes kids study and learn in exchange for internet access.
A generic 2D engine for any kind of game
a game library to develop audio games
Java Gamepad API for multiple platforms
3D Game engine
TurboSphere is an easy to learn and powerful JS based game engine.
A multiplatform game engine for interactive fiction experiences
3d lib
Scriptable frontend for media applications.
An extensible development framework for roleplay games.
Pear3DEngine is a modern and modular 3D development framework
Open Source Virtual World and MMOG Development Platform
CLM for Joomla! 1.5 + 2.5
Powerful html5 & javascript library for creating applications & games.
An HTML web game platform
Cross-platform 2D game engine
Game framework on top of Python, Panda3D and Twisted