GNU Radio - GNU FSF Project
- A collection of software (combined with minimal hardware), allows the construction of radios where the actual waveforms transmitted and received are defined by software. Latest major feature release is 3.2, 2009-05-23.
Ham Radio Control Libraries (Hamlib)
- The purpose of this project is to develop flexible and portable shared libraries that offer a standardised API to control any radio-oriented equipment through a computer interface. Latest release is 1.2.10, 2009-11-02.
KPSK -- PSK31 for KDE 3.x
- PSK31 digital radio communications application for use by licensed amateur radio operators and designed specifically for the KDE 3.x desktop environment.
Rivendell Project Home Page
- A complete radio open source broadcast automation solution, with facilities for the acquisition, management, scheduling and playout of audio content. Also available in Brazilian Portuguese, French, and German. Latest stable release is 1.6.0, 2009-12-17.
Sourcefabric - the Open Source Newsroom
- This not-for-profit organization believes in quality, independent journalism and provides media organizations with the open source software, tools and support to produce it. Software includes a radio suite enabling live broadcast and scheduling for radio stations and an open content management system for professional journalists.