F-Droid Search: contacts

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

Simple medicine (meds) tracker & reminder app. Enter the details, we'll remind yMIT

Secure 2FA authenticator with blockchain backup and encryption.BSD-3-Clause

Synchronise accounts only on specific networksGPL-3.0-only

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

Four- or five-row soft-keyboardApache-2.0

Open-source password manager: local encryption, autofill, TOTP, PasskeyGPL-3.0-only

Easily manage shared expenses with friends on your tripGPL-3.0-or-later

Encrypted email & calendar service - easy to use, secure by design.GPL-3.0-or-later

Receive encrypted messages while Briar is offlineAGPL-3.0-or-later

Access Android functions from TermuxGPL-3.0-only

Popular Android messaging app for VoIP.ms, a Canadian VoIP providerApache-2.0

Split shared group expenses and settle up with minimal transfersGPL-3.0-only

Euria, your sovereign AI assistant that respects your privacy and the planetGPL-3.0-only

Keyboard for secure E2EE communication through signal protocol in any messengerGPL-3.0-only

Launcher reduced to the essentials, intended for elderly peopleGPL-3.0-only

Secure and private messagingAGPL-3.0-only

(SECUSO) Create shopping lists and manage them privacy friendlyApache-2.0

Minimal text-only Android home screen. No icons. No analytics. Zero network.MIT

Personal messaging app for groups, with a self-hostable open-source serverGPL-3.0-only