A simple and easy-to-use library to enjoy videogames programming
Game engine supporting many 3D/2D formats and graphic effects
Arianne is an engine to develop multiplayer online games like Stendhal
Orx: Portable Game Engine
Small lightweight program to customize your keyboard
Example code for creating a 2D platform game in Java.
Portable game engine with main focus on point-and-click adventures
Multi-threaded game engine for Android
Toolkit for the easy prototyping of hybrid games for Tabletop Devices
A generic 2D engine for any kind of game
Scriptable frontend for media applications.
Game development toolkit
Open Source Virtual World and MMOG Development Platform
Fully fledged steam community SDK
Text-based adventure game creator and player. Comes with demo games.