@jcrabapple

Open source apps: Termux, Tusky, NewPipe, F-Droid, an old Android app called Pandoroid that still works (for now), All of the Fossify Apps.

Proprietary apps: Duolingo, Google Maps, Discord, WhatsApp. The last two are mainly to keep in touch with family and friends.

Those are all of the ones I can think of for now.