HAMtrainer

Study for the American HAM radio license examsApache-2.0

Funktrainer

This app will ask you the official questions of the German ham radio (amateur raApache-2.0

Bide et Musique

Listen and consult the "Bide et Musique" web radio.GPL-3.0-only

Meshtastic

The official app for Meshtastic, an open-source, off-grid, mesh radio.GPL-3.0-only

StreamPlayer

Live internet radio and audio streamingMIT

TOTALOG

FLOSS Ham Radio logging app for small contests and portable operation.MIT

Demodulate

Simple internet radio appGPL-3.0-only

RadioWave

RadioWave gives you access to 50,000+ internet radio stations worldwide.GPL-3.0-or-later

Hamfisted

Prepare for the German HAM radio license examGPL-3.0-only

TaffyQSL

Free and open-source amateur radio logbook with ADIF support and QSO signingGPL-3.0-or-later

KC3ICT Ham Study

Free offline ham radio exam flashcards — Technician, General, and Extra.MIT

xlog2

Peer-to-peer amateur-radio field logbook that syncs with the xlog2 desktopGPL-3.0-or-later

Spectre

Radio frequency scanner with recon and offensive capabilitiesGPL-3.0-only

Ham Test

Prepare for and pass all three US Amateur Radio license examsGPL-3.0-or-later

NightDream

Clock, screensaver & radio with dynamic brightness & custom layouts.GPL-3.0-or-later

RF Analyzer (FOSS)

Analyze RF signals on Android with HackRF, RTL-SDR, Airspy and HydraSDR.GPL-2.0-or-later

Knit

Encrypted mesh chat over Wi-Fi Aware & Bluetooth — no internet, no servers.GPL-3.0-or-later

Loud Bang

RX/TX capable WSPR clientGPL-3.0-only

Atalaya

Monitor and get information from nearby cell phone towers.GPL-3.0-only

WebSDR client

OnlineSDR receiverGPL-3.0-only