Here are some of my interests.
AMATEUR RADIO http://www.arrl.org/
QRP- Low powered Amateur Radio (less than 5 watts) http://www.fix.net/norcal.html
Grid Square Locator http://www.arrl.org/locate/locate.html
RF Safety Calculator http://n5xu.ae.utexas.edu/rfsafety/
SGC TUNERS http://www.sgcworld.com/
COMPUTERS http://www.thescreensavers.com/
PHOTOGRAPHY http://www.photo.net/
COMPUTER SIMULATION http://www.x-plane.com/
More Sim Links: http://www.x-plane.org/
FLIGHT SIM.COM http://www.flightsim.com/