Magic Playlist - Get the playlist of your dreams based on a song
Radio FM - Radio FM is an Internet Radio station streaming app made for music lovers.
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
Zeno Radio - Zeno Radio is a radio station streaming app that allows the user to listen to the radio over the internet.