A generalization of Conway's Game of Life
Conway's Game of Life is generalized to a continuous domain. OpenGL and GLSL shaders are used for real-time 2D and 3D graphics. Time stepping is done via a real to complex FFT based convolution operation. There are also two deliberately simple test implementations in FreeBasic and Matlab. A 2D version on a sphere shows that it is really not dependent on the underlying grid.
A 3D scene editor for Ogre in Purebasic
Arkeos Scene Editor 3D is a scene editor for creating game with Ogre 3D. It's created with Purebasic.
Tactical Warfare Engine is an Open Source 2.5D Real-Time Strategy game engine made using OpenGL. It aims to be a replacement for the aging StarCraft game engine, but also supports the creation of entirely new RTS games.