A planetarium software that shows a 3D simulation of the night sky
Satellite tracking software
Routines for wavefront propagation in IDL, Matlab, and Python
Fortran library to compute positions of celestial bodies
Command-line tools for astronomy and astrophysics
ProStack - a platform for image processing and analysis
BoPlanets shows planets relatively to an observing planet.
A tool for planning and logging your astronomical observations.
Arduino Focuser, fully ASCOM complaint
*nix Sidereal Clock
A scientific plotting library for C/Fortran built on cairo
Sight Reduction for Air Navigation with Python