Arianne is an engine to develop multiplayer online games like Stendhal
Orx: Data-Driven Game Engine
Game engine supporting many 3D/2D formats and graphic effects
Java Settlers
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
An environment to develop games based on a rectangular board
Flexible and easy-to-use 2d game engine
Create symmetric sprites: browse, save to PC, or store online
computer simulation for my raspberry pi
evolution for vegastrike SpaceSim/Combat/Trade game
Free strategy browsergame engine.
Cross platform Game Creation Software
AutoTeach makes kids study and learn in exchange for internet access.
A 2D Adventure Game & Engine
Modular Gaming Open Source Persistent Browser Based Game Framework
3D Interactive sandbox environment