Antenna Modeling Programs

EZNEC
AutoEZ
4NEC2
MMANA-GAL

xnec2c

Antenna Related links

AC6V    Lots of antennas
DK7ZB Lots of antennas
VE6YP  Coaxial Trap Computing Program
I1WQR Lots of antennas
AA5TB Antenna related
W8JI Lots of information
DXzone Antenna related

Miscellaneous

Coil32 A Program to Compute any Coil parameters by Valery Kustarev
VOACAP - VOAAREA Propagation prediction Program
VE3NEA Lots of Ham related software
Grid locator Find easily any locator
AD5X Lots of Ham related stuff
Create Azimuth Map

N5DUX Ham Radio PDFs  

If any of the links should not work any more PSE let me know, so I can delete it.