Ecoute for Mac

From PixiApps:

Ecoute has a lot of cool features, and only focuses on playing your iTunes library. Save your computer's memory!

Stay connected with your friends and share your music tastes using last.fm, Twitter and Facebook.

Ecoute is incredibly minimal! All your music goes into one window, which can be minimized a lot.

Configure shortcuts in order to get a better control on your music. You can also enable the Apple Remote receiver and control Ecoute with it.

The 'Desktop Controller' is a customizable widget that lets you control your music. Themes will be available from our 'Theme Center' soon.

Find music videos/lives of any tracks using YouTube integrated search, display lyrics and sing your favorite tracks.