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

NightDream

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

Spectre

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

RF Analyzer (FOSS)

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

Cosmovisor

Spot satellites overhead in augmented realityGPL-3.0-or-later

Privacy Cell

Verify that a phone is using the most secure cell protocols.GPL-3.0-or-later

Tempo

An open-source and lightweight music client for SubsonicGPL-3.0-only

WiFi Automatic

Turn off Wi-Fi automaticallyApache-2.0

BlueSound Controller

Control BluOS and Sonos multi-room audio players on your networkMIT

SysLog

Capture log filesGPL-2.0-or-later

Tempus

An open-source and privacy focused music client for SubsonicGPL-3.0-only