Last Updated April 12, 2009
Fldigi, a digital modem program for Linux, Free-BSD, Mac OS X, and Microsoft Windows XP, W2K, and Vista. Supports modes CW, Domino, Hell, MFSK, MT=63, PSK, OLIVIA, RTTY, Thor, and Throb.
Gpredict. A real-time satellite tracking and orbit prediction application. Integrates with hamlib to control radios and point antennas.
GRIG. Simple ham radio control program based on Hamlib. Integrates with other Hamlib logging and digital modes applications.
Ham Radio Control Libraries (Hamlib)
Hampedia -- An "encyclopedic" radio reference, BA and otherwise. Includes price history data...
Modern receiver reviews/stats/photos from www.dxing.com. The older tube radios are here
GAEL -- GNOME Assisted Electronics. The successor and assign of Oregano....
Ngspice mixed-level circuit simulator, based on Spice3f5, Cider1b1, and Xspice.
gEDA GPL's suite of Electronic Design Automation tools. gEDA has been selected as a Google Summer of Code 2008 project!
Biro's paper describing how to make tube Spice models.
Radau5's Tube Spice Fit Technique
Francesco Pintavalle's Tube Model Page Moving to http://audibleillusion.org "soon".
XCircuit -- an X11 circuit drawing and netlist program.
Numerical Electromagnetics Code NEC2 Page