DXZone
- http://www.dxzone.com/
- Links, including antique, vintage and military radios, collectors, museums, and history.
Edge of Space Sciences, Inc.
- http://www.eoss.org/
- Promoting science and education through high-altitude balloons and amateur radio; balloon flight schedules, radio frequency information, general program data.
QRZ
- http://qrz.com
- Includes news, searchable callsign database, license renewals and updates, DX spotting reports, APRS resources, clubs, solar report, and links.
QSL . NET
- http://www.qsl.net/
- Dedicated email and webspace service for the Amateur Radio Community; free space to licensed Amateur Radio Operators worldwide.