Ham Links Page
Call sign look up - QRZ (Practice Testing)
Echolink - Ham radio interconnected with the internet--talk in both directions!
Eham - another ham site with everything
Heavens Above - Visible satellites, objects, shuttle, tracking info, etc.
Links to projects, schematics etc.
SKYWARN Louisville
Satscape satellite tracking program - superb (and free)
SETI - Search for Extraterrestrial Intelligence
SSTV Programs - another source