Library to control radio transceivers and receivers
An open source Acars decoder with rtl_sdr frontend
Multiplatform Ham Radio APRS and Mapping Program
Decode packet radio data
Ham Radio QRP(P) Beacon on Cortex-M3 MCU from STMicroelectronics.
SDK for the SARK-110 Antenna Analyzer
elbug - simple c program for electronic morse key at the serial port
Some stuff to make AX.25 actually work across your networks.