Poolsuite™ - The super-summer music player
Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Tiny Mix - NPR Tiny Desk — mixed up, one song at a time.
Bowtie - Bowtie is a desktop accessory that allows you to see and control your music (iTunes, Spotify...
Magic Playlist - Get the playlist of your dreams based on a song
Owlead - Grow your Twitter with valuable followers, effortless