With Plaaying you control media (support for iTunes and Spotify) played on your Mac. The menu bar app is available in four attractive, proactive designs. Auto-Share can tell Twitter every song and video that plays without you lifting a finger.
Shazam
SmashTunes
SmashTunes lets you control iTunes and Spotify from the menu bar. It displays the currently playing song right on your menu bar along with other information that you choose (like artist, album, duration, rating).
SoundBar
SoundBar is a distraction-free SoundCloud music player right in your menu bar. Just copy/paste a playlist url and play it. No need to create an account.