Bitwarden. There’s no excuse not to use a password manager.

FDroid itself

Breezy Weather - https://github.com/breezy-weather/breezy-weather

LibreTube - https://github.com/libre-tube/LibreTube

NewPipe - https://github.com/TeamNewPipe/NewPipe

Secure Camera - Play Store / Github

FUTO Keyboard - Play Store / https://keyboard.futo.org/

Organic Maps - Play Store / https://organicmaps.app/

Musicolet, the only local player that I know allowing to switch between playlists and albums without losing each last played songs

A lot of bangers in the comments, but I didn’t see my favorite!

container (kinda) for your apps https://f-droid.org/packages/com.oasisfeng.island.fdroid/

Anytype - open source note taking app, similar to Obsidian.

Vampire Survivors - addictive game without intrusive ads

OsmAnd~: https://f-droid.org/packages/net.osmand.plus/
KOReader: https://f-droid.org/en/packages/org.koreader.launcher.fdroid/
Firefox with ublock Origin: https://www.mozilla.org/en-US/firefox/browsers/mobile/android/
uBlock Origin https://addons.mozilla.org/en-GB/android/addon/ublock-origin/

fcitx5 for android, basically gboard without Google service

https://f-droid.org/packages/org.fcitx.fcitx5.android/

• Signal ^{signal.org↗} - Free, open source, completely end-to-end encrypted messaging that lead by a non-profit.
• Shelter ^{f-droid.org↗} - Use Android’s built-in “Work Profile” feature to install or clone apps into an isolated space.
• Simplex ^{f-droid.org↗} - Like Signal but for the more paranoid. Not as good from a UX perspective so I can’t recommend it to everyone, but definitely just as good if privacy/security is your ultimate requirement.

Wavelet

aSQLiteManager. Use ot to keep track of dart scoring and use views for reports / stats

Jota Text Editor, Connect for Lemmy, google translate for live translation