modular, client–server software-defined radio
Webbased Amateur Radio Logging Software - Log your contacts from everywhere!
Native SDR++ source module for ESP-SDR on the ESP32-S3: real IQ over USB, no bridge needed
Handheld AM / FM / SW receiver on ESP32-S3 and SI4732. SSTV, Morse, RSSI homing, and a web remote.
SpyServer + rtl_tcp bridge for ESP-SDR on the ESP32-S3: real IQ over USB into SDR++, SDR#, GNU Radio and gqrx
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
Satellite tracker and pass predictor for Android, inspired by Gpredict
Gpredict satellite tracking application
A cross-platform Winlink client written in Go
Advanced repeater system software with EchoLink support for Linux including a GUI, Qtel - the Qt EchoLink client
RTL USB HTML SDR radio
Portable touchscreen SDR for M5Stack Tab5 + RTL-SDR dongles — spectrum, waterfall, FM/AM, Shortwave, ADS-B, FT8, P25, LoRa, RF tools, and Wi-Fi analysis without a PC.
Morse Code Trainer APK 2026: Koch Method for R36S Handheld Gamers
Open Source Metamorserino ESP32 Firmware and Modular Synth Toolkit 2026
CW Dojo 2026: Morse Code Trainer for R36S with Koch Method and Band Explorer
Set your radio to 148.500 MHz, select FM, USB, or CW mode, and set the squelch to 0 or 1. Then, extend your radio's antenna toward the monitor's HDMI port, and congratulations—you can now transmit in Morse code directly from your monitor!
Dark Minimalist Morse Code Trainer 2026: Koch Method, Farnsworth Timing, Rhythm Game, Callsigns & Q-Codes Practice
A WebSDR server: C++17 with no dependencies, a one-line install, and an admin panel for everything. Demo: demo.fernsdr.org
Modular Open Source Radio Firmware
Cloudlog is a web-based amateur radio logging application built with PHP and MySQL. It supports a wide range of station logging activities, from HF to microwave, and integrates with companion tools for CAT control and automation.