Android Apps

browser: Firefox / Fennec / IronFox
email client: K-9 Mail / Thunderbird
CalDAV / CardDAV: DAVx5

Photos

camera app: Open Camera
image gallery: Aves Libre
- alternative: Fossify Gallery
photo editor: Image Toolbox

Audio

music player: Metro / Symphony / Vanilla Music
Navidrome client: Symfonium
voice recorder: Audio Recorder / Fossify

Productivity

todo.txt: Simpletask
calendar: Etar / Fossify

RSS reader: Feeder
Mastodon
- more customisable: Fedilab
- more aesthetic: Moshidon
Lemmy: Jerboa / Thunder
Pixelfed: PixelDroid / Pixelix
YT frontend
- direct connection to YT: NewPipe / SkyTube / Tubular
- piped proxy: LibreTube

Programming

code editor: Acode
- alternative: SCode Studio
GUI git client: MGit

Security

local password manager: KeePassDX
local 2FA: Aegis

Other

weather: Breezy Weather
translate: Lentil Translate / LibreTranslator
calculator: yetCalc / CalcYou
- alternative: OpenCalc
clock: Chronos / Clock You / Fossify
local AI: Maid

System

dialer: Emerald Dialer / Fossify Dialer
contacts: Connect You / Fossify Contacts
SMS messenger: Quik SMS
keyboard: FlorisBoard / HeliBoard
file manager: Material Files / MiXplorer
alternative app stores
- standard: Aurora Store
- FOSS: f-droid / G-droid / Aurora Droid
OCR: OCR (based on Tesseract)
QR codes: Binary Eye / SecScanQR