Build Cross-platform Applications
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Mahasona engine is an open source game engine.
Cross-platform C framework very compact libraries and tools.
a game library to develop audio games
3D Game engine
Convert Ren'Py visual novels into a format your ebook-reader knows
3D Web UI, Embed Web and Flash in 3D Games, based on WebKit
An open source C++ console based game (Windows only).
Investigo - DX9 Performance and Debugging Toolkit
A cross-platform OpenGL based lightweight scenegraph library