Satellite tracking software
Virtual X-Ray Imaging Library on GPU
Direct Simulation Monte Carlo (DSMC) Simulator
tiny code, html webcam game or plug brain in each blob, java server
C++ library for very easy operating with TLE data sets and files.
3-DPhysicsSim is an interactive 3-D physics simulator.
A simple N-Body simulator.
Convert output of PhysxCalc to Libre Office Math