Mac OS X and Windows OpenGL 3D Engine tools, content and code to create games and applications. Newton physics, OpenAL sound with OGG Vorbis, Lua, Revolution, written in C.
AnaLina is a mathematics/physics presentation, visualization and simulation system. It is intended to be used by teachers etc. in classrooms to help in teaching linear algebra and physics (mainly mechanics).
QuantimSim is a physics simulation engine. Some aspects of astrophysics, electromagnetism, relativity, thermodynamics, statistical mechanics and quantum mechanics will be included in the simulation library.