Soundiiz - Transferring playlists between various music streaming platforms.
SpotiMy - Play/Pause and Next/Previous functions for Spotify directly on your Menu Bar!
Tune My Music - Transfer Playlists Between Music Services
Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Musconv - MusConv Tool is powerful music migration program.
Owlead - Grow your Twitter with valuable followers, effortless