INSTEAD - Simple Text Adventure Interpreter.
Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
Molecular viewer and prototyping framework
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.
Sdk library for creating 2048 game in c#.
2D Game Engine
Cross-platform 2D and 3D game engine
A complete web framework to create online Fighting Fantasy adventures
An environment to develop games based on a rectangular board
Asphyre is a cross-platform framework for Delphi and FreePascal.
Um pequeno framework didático de games em Java
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Free strategy browsergame engine.
Cross platform Game Creation Software
AutoTeach makes kids study and learn in exchange for internet access.