SleepGuard - dead man's switch
Locks your phone when you fall asleep watching videos. No ads, open source.GPL-3.0-or-later
FTPS Server
Run a secure FTP server and share files on your local network, with no ads.CC0-1.0
Wikipedia
The official app for Wikipedia, the world’s largest source of information.Apache-2.0
Jami
Share, freely and privatelyGPL-3.0-or-later