#Android:

New Material 3 YT Music Clients:

Flutter YT Music Clients

Universal Clients:

Not really open source:

#IOS:

#Windows:

#Linux:

#Mac OS:

Google Sign-In support: SpMp, YTMDesktop, Muzika, YTMusicUltimate, InnerTune

Spotify Login support: Spottube

Credits for helping with the list to u/KitkatBakeman on Reddit