Magic Playlist - Get the playlist of your dreams based on a song
Replayify - Create playlists from your most played Spotify tracks
PRIZM - Intelligent music player that you can plug into any speakers
SpotiMy - Play/Pause and Next/Previous functions for Spotify directly on your Menu Bar!
Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Poolsuite™ - The super-summer music player