aTalk
XMPP/Jabber client with encrypted instant messaging and video callsApache-2.0
Simlar - secure calls
Protect your privacy with encrypted phone calls.GPL-2.0-or-later
Conversations
Encrypted, easy-to-use XMPP instant messenger for your mobile deviceGPL-3.0-only
Keep Alive
Notify others if you haven't used your device in a given period of timeApache-2.0
monocles chat
is a secure XMPP chat client for AndroidGPL-3.0-only
Threema Libre
Secure and private messagingAGPL-3.0-only
Contact Diary
Keep track of the people you have recently been withGPL-3.0-or-later
TICE – Secure GPS Location Sharing with Friends
Meet up and locate your friends, family and colleagues on a mapGPL-3.0-only
Yet Another Call Blocker
Block unwanted calls effortlesslyAGPL-3.0-only
Nextcloud
Synchronization clientGPL-2.0-only
Clock
Alarm, clock, timer and stopwatch modeApache-2.0
Keyoxide
Verify decentralized cryptographic identities on the goAGPL-3.0-or-later
Nextcloud Talk
Have private video calls and chat using your own server.GPL-3.0-only
Find My Device (FMD)
Locate and control your device remotelyGPL-3.0-only
Barcode Scanner
Scan barcodes on products, or barcodes containing URLs, contact info, and so onApache-2.0
Nextcloud Dev
Synchronization clientGPL-2.0-only
QR Scanner (PFA)
(SECUSO) Privacy Friendly QR-Scanner with minimal permissionsGPL-3.0-only
Dicio assistant
Voice assistant: multilanguage, configurable and libreGPL-3.0-only
Barcode Scanner
An open-source app that allows you to read and generate barcodes.GPL-3.0-only
Ente Photos - Encrypted photo storage
Backup, Organise, Share - Private photo storage with end-to-end encryptionAGPL-3.0-only