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

Universal wireless communication library for embedded devices

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

✈️ Multi-functional, compatible DIY general aviation proximity awareness system

HamPi

AIS receiver for RTL SDR dongles, Airspy R2, Airspy Mini, Airspy HF+, HackRF, SDRplay and SoapySDR

This is a LoRa APRS iGate/Digi based on an ESP32

A LoRa based APRS tracker for ESP32 boards.

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

This is the Xastir APRS client repository.

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)

LoRa ESP32 KISS Bluetooth modem (for APRSDroid or aprs.fi iOS) + APRS-IS RX/TX iGate over WiFi + Digipeater + DV (with Codec2 Walkie-Talkie)

aprsc, a core APRS-IS server

📡 Python module for working with APRS

Custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. Supported modes include APRS, Horus 4FSK mode, CATS, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.

Generate APRS Passcode 🔐 using PHP for use in Amateur Radio APRS Applications when connecting to the APRS-IS Network.

Python APRS Module

A pure-Python implementation of the KISS Protocol for communicating with serial TNC devices for use with Amateur Radio.

Create simple APRS modulator using Arduino UNO

Ham Radio of Things (HRoT)