Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Soundiiz - Transferring playlists between various music streaming platforms.
Bowtie - Bowtie is a desktop accessory that allows you to see and control your music (iTunes, Spotify...
Tune My Music - Transfer Playlists Between Music Services
Owlead - Grow your Twitter with valuable followers, effortless
Musconv - MusConv Tool is powerful music migration program.