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The Ground Station Software Suite projects aims at providing free, useful software tools for ham radio operators. Currently, these projects used to host the Grig communication radio control and Gpredict.
The source repositories have been moved over to GitHub.
A Smith charting program. You can enter either discrete components or transmission lines, see the results on screen and/or generate Postscript output. Component values can be changed numerically or using scrollbars.
EggsHam is a PalmOS application that generates (and grades) _practice_ amateur radio licensing exams. It is for people interested in obtaining an amateur radio license in the US, who want to practice for the Technician, General, or Extra written exam.
Enhanced Machine Controller-based Antenna Range (EMCAR)
EMCAR employs LinuxCNC based machine control (linuxcnc.org) coupled with open source software to implement a measurement system for antenna radiation pattern data (i.e. an antenna range).