Arianne is an engine to develop multiplayer online games like Stendhal
INSTEAD - Simple Text Adventure Interpreter.
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
JavaScript framework to build game engines, games, emulators and apps
Java Settlers
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Quake PAK file utility
A complete web framework to create online Fighting Fantasy adventures
Generate ready-to-use disc images for your Sega Dreamcast system !
An environment to develop games based on a rectangular board
Asphyre is a cross-platform framework for Delphi and FreePascal.
Perl bindings to the Modern OpenGL API
Um pequeno framework didático de games em Java
Free strategy browsergame engine.
Cross platform Game Creation Software
AutoTeach makes kids study and learn in exchange for internet access.
Modular Gaming Open Source Persistent Browser Based Game Framework
Take the chess graphism, and use it with a chess engine.