Gideros Release version
JavaScript framework to build game engines, games, emulators and apps
INSTEAD - Simple Text Adventure Interpreter.
Game engine supporting many 3D/2D formats and graphic effects
A cross platform Lua based game engine
Multidocument automation by templates - for sphinx, mkdocs, epydoc ...
Build Cross-platform Applications
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Asphyre is a cross-platform framework for Delphi and FreePascal.
3D .NET engine for Windows, Linux, Mac
An advanced flexible game engine for Java.
Cross platform Game Creation Software
A generic 2D engine for any kind of game
C++ game libraries plus server.
Pygrid is an open-source and cross-platform pygame/python 2D engine.
An extensible development framework for roleplay games.
Cross-platform reimplementation of AMOS BASIC (runtime)
AMOS BASIC reimplementation in Java
The Lambda-Engine is a cross platform game engine.
Make games with Lego-like building blocks