• Buckmaster Call Sign Server
• QRZ Ham Call Sign Database
• International Amateur Radio Union (IRAU)
• New Zealand Amateur Radio Assn. (NZART)
• Wireless Institute of Australia (WIA)
• Radio Society of Great Britain (RSGB)
• American Radio Relay League (ARRL)
• South Africa Radio League (SARL)
• eHam Amateur Radio Community
• CQ Amateur Radio Magazine
• International Beacon Project
• Great Circle Maps
• Metvuw Weather

Misc.

• Flex Radio Systems - Software Defined Radio
• AlexLoop - Magnetic Loop Antennas
• INRAD - International Radio
• Comtek Systems
• DXSoft Amateur radio software
• Harbach Electronics
• QRO Technologies
• MFJ Enterprises
• Heil Sound
• Richard Measures AG6K
• N0HR.com Best Links & Resources
• RF Cafe - links page
• Peter W Dahl
• Ameritron
• Alpha Radio Products
• MFJ Enterprises
• Ham Info Bar
• The eHamStore