3D Engine c++
Android, UIQ 3.0, Series 60 Edition 5 open-source software
INSTEAD - Simple Text Adventure Interpreter.
A MUD client for Android, iOS, Linux, Mac OS X and Windows
GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
A cross-platform interpreter for many point-and-click adventure games
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
This is a hacking style game set in the early '80s
Cross platform Game Creation Software
A puzzle game of rules acting upon rules. Create the desired pattern.
Cross platform administration tool for Source Engine dedicated servers