AirNav provides free detailed aeronautical information on airports and other information to assist pilots in gathering information for flight planning. It's also useful for some hangar flying on those days when the weather or the checkbook keep you on the ground. Airport details include airport location, runway information, radio navigation aids and communication frequencies, FBO information, fuel prices, and a wealth of other information for pilots. Also tools for airport search, fuel price search, and a fuel stop planner. All searchable, all free.

The European PSK Club, or EPC for short, is an informal club of amateur radio operators dedicated to maintaining high levels of amateur radio communications on PSK modes.

The American Radio Relay League (ARRL) is the national association for amateur radio, connecting to hams around the U.S. with news, information and resources.

Amateur Radio Freeware Program for PSK31, providing Digital Panoramic Tuning when used with a Windows PC and an amateur bands transceiver

Joomla - the dynamic portal engine and content management system

DX Zone directory with 15000 Amateur Radio links, about Ham-Radio radio scanning, cb radio and shortwave listening, antenna homebrew projects and a complete radio software collection. Include a free classified ads, ham radio reviews and operators directory