Gravit

It records the history of each particle so it can animate and display a path of its travels. At any stage you can rotate your view in 3D and zoom in and out. Gravit uses OpenGL with Lua, SDL, SDL_ttf and SDL_image.

Major Features:

1. View the simulation in 3D using stereoscopic imaging
2. Can be installed as a screen saver in Windows
3. You can record, then play back at any speed
4. Store every particles position for every frame in memory
5. Compress history when needed, for very long recordings
6. Mouse controllable rotation
7. Console with script execution
8. Colors can be based on mass, velocity, acceleration, momentum or kinetic energy
9. See an oct-tree being created in real-time
10. Save/Load functionality
11. Update display/input while recording a frame

Requirements: Linux, Windows and Mac OS X