RPG Maker 2000/2003 and EasyRPG games interpreter
The Ren'Py Visual Novel Engine
Magic Another Game Engine
utility collection for 2D game development in Java; sound-player
Full featured MUD server with all the trimmings.
Game engine supporting many 3D/2D formats and graphic effects
An online multiplayer turn based strategy game and board game engine.
Built to be ease of use, with no programming knowledge, Multi-platform
Visual Novel engine, editor and game development.
Free MMORPG Engine. Develop and host graphical browser-based games.