Fennec F-Droid is based on the latest Firefox release (codenamed Fenix). It has proprietary bits and telemetry removed, but still connects to various Mozilla and Google services that can track users.
f-droid.org/en/packages/org.mozilla.fennec_fdroid
Gadgetbridge is an Android (4.4+) application which will allow you to use your Pebble, Mi Band, Amazfit Bip and HPlus device (and more) without the vendor's closed source application and without the need to create an account and transmit any of your data to the vendor's servers.
www.gadgetbridge.org
The third-party Telegram android app.
f-droid.org/en/packages/nekox.messenger
Cross-platform chordpro reader app for Android and iOS written with React Native.
github.com/artutra/OpenChord
#app #audio
Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn. Available for Windows, Mac, Linux, iOS, Android, and any device with a web browser.
apps.ankiweb.net
#tool #app
Stingle Photos is a convenient, easy to use Gallery/Camera application with Backup and Sync functionality for your photos and videos which seamlessly provides strong security, privacy and encryption. Available for Android and iOS.
stingle.org
#app #organization #backup
Keep track of the people you have recently been. Available for Android.
github.com/apozas/contactdiary
#tool #app #organization