There are a lot of really good free software Android apps, like, almost enough to have a usable phone with only free software.

I use
- Firefox as my browser
- Signal for messaging
- VLC to play media
- OSM for maps
- Twidere for twitter.

I still need (feel free to suggest one!)
- a camera with nice filters (I use B612)
- a fast and good UX wrapper around the nextbus API (I use the Transit app)
- email, calendar, etc... but my accounts are with google, so, meh

@morganastra K-9 Mail for email. Supports openpgp, if you're into crypto

@infomorph I'm into crypto but PGP is terrible and doesn't result in encrypted emails in practice haha. Yeah I should have mentioned k9, it's a decent app, I find the UI a little clunky to use and ugly though

@morganastra I wholeheartedly agree that pgp is just ... ugh.

@infomorph right now my favorite messaging app and protocol is Signal - it's passed a crypto audit, it's really easy to use right and hard to use wrong, and the UI is really pretty. I wish the desktop app supported keyboard shortcuts though, having to use a mouse for it is pretty bleh