Game engine supporting many 3D/2D formats and graphic effects
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
A cross platform Lua based game engine
Source code of the chapters of the book 3D Game Development with LWJGL
Asphyre is a cross-platform framework for Delphi and FreePascal.
Single-/multi-player card game Mau Mau (similar to UNO®)
Built to be ease of use, with no programming knowledge, Multi-platform
AutoTeach makes kids study and learn in exchange for internet access.
Java Gamepad API for multiple platforms
Modular Gaming Open Source Persistent Browser Based Game Framework
A very small multi-platform game engine for creating desktop games.
Little game background framework in java.
Game framework on top of Python, Panda3D and Twisted
Read and write PGN format and test moves for legality.