Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
JavaScript framework to build game engines, games, emulators and apps
Old-school 2D game engine
INSTEAD - Simple Text Adventure Interpreter.
Java Settlers
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Quake PAK file utility
The imaginary eight-bit machine
A cross platform Lua based game engine
8-bit Graphical API for Java
Multidocument automation by templates - for sphinx, mkdocs, epydoc ...
A complete web framework to create online Fighting Fantasy adventures
Portable game engine with main focus on point-and-click adventures
X3D Prototypes for the SMUOS Component
Build Cross-platform Applications
Generate ready-to-use disc images for your Sega Dreamcast system !
An environment to develop games based on a rectangular board
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Asphyre is a cross-platform framework for Delphi and FreePascal.