A promising chess program
Orx: Data-Driven Game Engine
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
Open Game Bootstrap
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Cross platform Game Creation Software