Magic Playlist - Get the playlist of your dreams based on a song
RadioLY - RadioLY is an online FM and AM Radio streaming app that allows its users to listen to 60,000+ radio stations from all over the world, no matter wherever they are.
Spotalike - Spotify playlist with similar songs, according to Last.fm
Allradio - Allradio is a program for playing internet radio and tv channels.
Playlist Machinery - Tools that help you create & organize your Spotify playlists
radio.net - Radio app for Apple TV, iOS, Android, Fire TV and web with 30000 stations