Cross-platform C framework very compact libraries and tools.
A generic 2D engine for any kind of game
a game library to develop audio games
C++ game libraries plus server.
A 2D Adventure Game & Engine
Multi-threaded 2D Renderer licensed under the Mozilla Public License
Modular Gaming Open Source Persistent Browser Based Game Framework
A 2D game engine base on OpenGL and SDL,support for Windows & Linux
Library for creating turn-based games with simultaneous moves.
TurboSphere is an easy to learn and powerful JS based game engine.
A mobile tower 3D tower defense/defend the flag game
C++ Framework for slot machine games
Kinect based controller.
3D Interactive sandbox environment
A 3D, fully concurrent game engine