Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

Clutterfree F-Droid client

Easy to use OpenStreetMap editor for Android

An F-Droid client with modern UI and an arsenal of extra features.

A Matrix collaboration client for Android.

Outliner for taking notes and managing to-do lists

Free Public Transport Assistant without Ads or Tracking

LTeX Language Server: LSP language server for LanguageTool 🔍✔️ with support for LaTeX 🎓, Markdown 📝, and others

Cobble: Rebble device companion app for iOS and Android

OpenStreetMap surveyor app for experienced OSM contributors

Android app - (Deprecated) - New version: https://github.com/standardnotes/mobile

Add new items to dynalist quickly (native android app)

Smart Contact Reminder redesign

Pebble™ device setup helper for Android. Now that Pebble web-services are discontinued.