Newpipe/Pipepipe (YouTube with no account)

Molly (Signal Fork)

Aegis (2FA)

Florisboard/FUTO/Gboard (Better Keyboard app)

Google Camera (For if you want better photos, there may be a guide for installing it in a privacy respecting way on the GOS Discuss Forum)

Gallery (Much better than the default Gallery app) (https://github.com/IacobIonut01/Gallery/releases)