Magic Playlist - Get the playlist of your dreams based on a song
Bowtie - Bowtie is a desktop accessory that allows you to see and control your music (iTunes, Spotify...
PRIZM - Intelligent music player that you can plug into any speakers
Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Replayify - Create playlists from your most played Spotify tracks
Owlead - Grow your Twitter with valuable followers, effortless