Comment by bramhaag

Some other FOSS apps I use daily:

Aegis - 2FA (https://github.com/beemdevelopment/Aegis)

Breezy Weather - A very good looking weather app (https://github.com/breezy-weather/breezy-weather)

OnlyOffice Documents - MS Office suite replacement (https://github.com/ONLYOFFICE/documents-app-android)

Fossify Calendar (https://github.com/FossifyOrg/Calendar)

Fossify Messages (https://github.com/FossifyOrg/Messages)

Aves - Local gallery with great organization (https://github.com/deckerst/aves)

Termux - Terminal emulator (https://github.com/termux/termux-app/)

Unexpected Keyboard - A unique keyboard that pairs nicely with Termux (https://github.com/Julow/Unexpected-Keyboard)

WG Tunnel - WireGuard client (https://github.com/wgtunnel/wgtunnel)

These are all easily installed through Obtainium: https://obtainium.imranr.dev/