Try Proton Calendar

On Android; mpv, KeePassDX, FlorisBoard, AntennaPod, Read You, NewPipe, Jerboa, Unitto Calculator, CloudStream, Aegis, TrailSense, OpenKeychain, K-9 Mail, EDS lite, ViMusic, InnerTune, GrapheneOS Camera, Librera FD …are my favourites.

KeePassDX, NewPipe, ViMusic, Aegis, OpenKeychain, mpv, AntennaPod, TrailSense, SuperImage, Librera Reader, Jerboa, Stealth