Some ideas:

#Fossify suite of utility apps

GPS: #OsmAnd, #CoMaps

Bible (or Faith): From YouVersion to #AndBible

Keyboard: From Gboard to #FUTO Keyboard or #Heliboard

Social Media: mainstream ones to Nostr!

Video: YouTube to #NewPipe, #Odysee, etc.

Music Streaming: Spotify, YouTube Music, or Apple Music to Wavlake?

Audio Player: #Musicolet

Translation: Google Translate to Yandex Translate

Audio Books: Audible to #LibriVox

Finance: $ to ₿