TasteDive - TasteDive recommends similar music (musicians, bands), movies, TV shows, books, authors and games, based on what you like.
Gnoosic - Even if you don't know what you are looking for - gnod will find it.
Musicroamer - A visual Pandora for discovering new music
LivePlasma - Discovery engine map for books, music, and movies
TasteDroid - TasteDroid is an app that offers recommendations for books, movies, music, authors, and much more.
Songstack - Swipe to discover new music for Spotify