Astronomical Ephemeris
Command-line tools for astronomy and astrophysics
A library containing Some Useful Fortran Routines
ProStack - a platform for image processing and analysis
Open Source Astronomy Tools
BoPlanets shows planets relatively to an observing planet.
A tool for planning and logging your astronomical observations.
Tools to analyse output from the stellar-evolution code ev/STARS/TWIN
Gigapixel GPU accelerated radio interferometric imager
GPU/MIC accelerated radio interferometric calibration program
A gravitational-wave parameter-estimation code for LIGO/Virgo
Analyse output from MCMC codes like SPINspiral and lalinference_mcmc
Hunting Planets in the Kepler Data
Simple astronomical CCD controller
INDI C# Client
Free Live DVD distributive designed for astronomy amateurs.