Tuta Mail

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

Conversations

Encrypted, easy-to-use XMPP instant messenger for your mobile deviceGPL-3.0-only

AndBible: Bible Study

Read the Bible, study commentaries or dictionaries, or read books offline.GPL-3.0-or-later

Jami

Share, freely and privatelyGPL-3.0-or-later