Echoes is a radio spectral analysis software for SDR devices
Translate RSS/Atom and Twitter into Morse, send Morse from Key/Mouse
DX Cluster client for radio amateurs
Portable Vector Network Analyzer
An open source Acars decoder with rtl_sdr frontend
Multiplatform Ham Radio APRS and Mapping Program
Ham Radio QRP(P) Beacon on Cortex-M3 MCU from STMicroelectronics.
An impressive early implementation of TCP/IP
unofficial Radio of Bollywood hungama
Telecar 9 radio open source firmware