Before there was Google Music, there was Subsonic. This app has attracted quite a lot of users for its ability to stream music that you have stored on your PC. The only trouble is that it has always been fairly ugly. This update solves that issue.
After installing the Subsonic app, you have to pick up the server software for the computer where all your media is stored. Sadly, this software will cost you $15, but there is a free trial.