Satellite tracking software
Routines for wavefront propagation in IDL, Matlab, and Python
Earth orbits and satellite coverage display in 3D on your laptop.
User interface for INDI Eqmod telescope driver
*nix Sidereal Clock
A scientific plotting library for C/Fortran built on cairo
C API to control NexStar compatible telescopes
A planetarium software that shows a 3D simulation of the night sky
Open source observatory control software
Cross platform Perl API to control NexStar compatible telescopes
converts cosmic-ray files from GALPROP for viewing / plotting.
Real-time 3D visualization of space
Siril is an astronomical image processing software for Linux.