HamRad - Amateur Radio Resource -- a site with links to organizations, manufacturers, dealers, miscellaneous ham sites, events, radio mods, a classified section, etc.
K1DWU includes a list of over 4,000 links, along with pages on amateur radio, space, satellites, etc.
SpaceScience.com features daily news about NASA research, live sky events, space weather, and opportunities to participate in real NASA science.
SpaceWeather.com Science@NASA presents science news and information about the Sun-Earth environment.
"Sunspots and the Solar Cycle," sponsored by Science@NASA, presents considerable information on sunspots in layman's terms (it's aimed at students), and includes sunspot news and links to other related sites. It also includes the daily sunspot number.
The Solar Terrestrial Dispatch provides information regarding the state of the Sun and its effects at the earth, and develop specialized computer software and services for the space weather industry.
W7MD Solar Resources -- Solar Weather reoprts and lots of links to other Solar report pages!
Weatherimages -- "Mission Statement: To provide free,a concise and user-friendly weather web site that pulls together the most valuable and frequently accessed weather data on the internet." TONS of weather info,from data, radar, etc., solar to seismic info, local sunrise/sunset calculator, bodies of water, aviation, NOTAMs, to humor and tons more. This entire website is maintained solely by Mark Brooks, WX4MSB, a RARS member.
HAP Charts -- An experimental site providing Hourly Area Prediction (HAP) propogation charts for selected US cities, real time, based on data out of Boulder, Colorado. ( From a site in Australia! )
Callsign Lookup Sites
Just passed your exam? Find your callsign at any of these sites.
Check the FCC ULS License Search page for your new callsign or update. - It's harder to use, but new callsigns will show up there 24 hours before the other pages.
InterFlex Systems - KaGOLD for Kantronics, PkGOLD for AEA tncs. All Mode, Dual and Single Port tncs, Packet Pactor Amtor Gtor modes, Win 3.xx, Win 95, OS/2, DOS systems.
Swisslog - One of the most appreciated logbook program among Radio Hams due to high flexibility and lots of available functions. Download for free the demo and last updated country file.
Motorola - makers of commercial radios and repeaters
SCS (Special Communications Systems) - creators of PACTOR, makers of multimode-multiport-controllers with PACTOR-II, a digital Mode for HF data transmission.
TEN-TEC - Amateur radio manufacturer of ham transceivers and kits.
Vibroplex - The oldest name in Ham Radio, makers of cool keying equipment.
Wavenode - Wavenode manufactures a four-channel, precision RF watt/SWR/DC meter for 1.8-450Mhz. Software utilities provided to observe average, peak, forward and reflected power. Serves the amateur radio, emergency, police and business radio market.
Yaesu - makes trancievers, antenna rotors, and other ham equipment
Durham Radio Sales & Service Inc. (Ontario, Canada -- NOT N.C.) - Radio Supplies, Equipment, Kits for the entire radio community. Also has links to other sites of interest.
Grove Enterprises - Scanner radio products, amateur antennas, and other accessories
GigaParts - Full service computer and amateur radio store
Ham Radio Links 
