Play provides basic music listening, but also adds more social elements to the listening experience. You can rock out to any music on your iOS device from within the app's interface--and also post to Twitter or Facebook about your songs, follow others to see what they're listening to, and comment upon and "like" your friends' songs.

There's free music on Play, too. The app's Album Play section gives you access to certain full-length CDs in a CD Listening Party feature, select MP3s in MP3 of the Day, exclusive tracks from SXSW, and more than 47,000 Shoutcast radio stations. If you like to discover new music through other people, Play also lets you preview your friends' songs through the app, iTunes, and Rdio.

Play is available for free and requires iOS 4.0 or later.

[]