Tuta Mail
Encrypted email & calendar service - easy to use, secure by design.GPL-3.0-or-later
Oversec
Privacy for All Apps! Encrypt and Disguise Messages in All Your Apps!GPL-3.0-or-later
Trail Sense
Use your phone's sensors to assist with wilderness treksMIT
FreeOTP+
Enhanced fork of FreeOTP-Android providing a feature-rich 2FA authenticatorApache-2.0
Quicksy
Jabber/XMPP with Easy Entry and Easy DiscoveryGPL-3.0-only
AuthPass - KeePass compatible Password Manager
Keep your passwords safe across all platforms and devices.GPL-3.0-only
Ente Photos - Encrypted photo storage
Backup, Organise, Share - Private photo storage with end-to-end encryptionAGPL-3.0-only