TunesArt - TunesArt is the perfect companion for iTunes and Spotify on macOS: display an album cover on your desktop, download lyrics, quickly search your music library, share on Last.fm and Twitter, and control your player...
Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Jango - Jango internet radio is all about making online music free, easy and fun.
Skip Tunes - Control iTunes, Spotify, or Rdio from your Mac's menubar
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Plaaying - Share, control, and keep on Plaaying music on your Mac.