Earth orbits and satellite coverage display in 3D on your laptop.
SaVi - simulate Starlink, Iridium, Globalstar, O3b, GPS, Galileo and other satellite constellations, modify them, or design your own. Requires Tcl/Tk and Unix libraries; 3D viewing option requires Geomview running on X Window.
A simple command to convert calendar dates to julian dates. Quite useful in
timing situations where you need elapsed time between dates.
Also useful for astronomy applications.
A bash script that allows Seti @ Home users to queue up and process multiple work units. This means you don't have to connect to the seti servers after every work unit, and only when you want to.