Universal wireless communication library for embedded devices

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

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

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

HamPi

LoRa APRS iGATE for ESP32 Based Board with Rx + Tx capabilities

LoRa APRS Tracker with Tx and Rx capabilities, Messages, Wx, Winlink and more...

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.

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)

This is the Xastir APRS client repository.

Easy-to-use custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. Configure and flash the firmware using a web browser (WebUSB). Supported modes include APRS, Horus 4FSK mode, CATS, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.

aprsc, a core APRS-IS server

📡 Python module for working with APRS

Create simple APRS modulator using Arduino UNO

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

The APRS Documentation Project: APRS Protocol Specification 1.2, Understanding APRS Packets, How to Get Started in APRS, The Best APRS Presentations, etc.