These are some of the apps that I find super useful and the best of what's available in the FOSS Android market
- Aves/Aves Libre
- Vespucci
- Image Toolbox
- MJ PDF
- DiskUsage
- Termux
- LibreOffice Viewer
An advanced gallery app? Check.
A pretty popular editor to contribute to OpenStreetMap on the go. It may take a while to get used to it, but then it's worth loving every pixel of it.
No FOSS photo editor for Android that's advanced? Think again.
Literally the fastest and most straightforward PDF viewer you could ever get.
Not only FOSS but also an innovative app to manage storage.
Probably heard about it as well. It's synonym is "All rounder" I guess.
The "MJ PDF" equivalent of office files.