TubeLister - Generate a YouTube playlist from your opened tabs.
BandNext - Discover bands that sound similar to artists you already love with BandNext. A single click saves your results to a Youtube playlist.
Vidlis - Create music playlists from YouTube videos.
Gnoosic - Even if you don't know what you are looking for - gnod will find it.
Tuned Rocks📺 - Discover🔎 curated Youtube videos 24/7
TasteDive - TasteDive recommends similar music (musicians, bands), movies, TV shows, books, authors and games, based on what you like.