Cross-Platform Software-Defined Radio Application

Dire Wolf is a software "soundcard" AX.25 packet modem/TNC and APRS encoder/decoder. It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate). For more information, look at the bottom 1/4 of this page and in https://github.com/wb2osz/direwolf/blob/dev/doc/README.md

Open source, multi-user SDR receiver software with a web interface

A tool for reading, displaying and saving data from the NanoVNA

Gpredict satellite tracking application

Custom firmware for the HackRF SDR + PortaPack H1 addon

📡 An AX.25 packet radio chat protocol with support for digital signatures and binary compression. Like IRC over radio waves.

Open-source satellite tracker and pass predictor for Android, inspired by Gpredict

HamPi

A cross-platform Winlink client written in Go

Web based amateur radio logging application built using PHP & MySQL supports general station logging tasks from HF to Microwave with supporting applications to support CAT control.

Advanced repeater system software with EchoLink support for Linux including a GUI, Qtel - the Qt EchoLink client

Quansheng UV-K5 Firmware

HamMessenger is a portable device that uses a ham radio and the APRS protocol as a medium to send and receive text messages.

CubeSatSim, the AMSAT CubeSat Simulator

Open re-implementation of the Quansheng UV-K5 firmware

A frequency scanner for Gqrx Software Defined Radio receiver

Turn your Android phone into Amateur Radio Codec2/OPUS APRS enabled DV handheld transceiver (Bluetooth/BLE/USB/TCPIP KISS/Sound modem client for DV digital voice communication)

A GUI application for configuring and programming cheap DMR radios under Linux and MacOS X.

FT8 library