Grooveshark lets you upload your music for easy access anywhere that there's an Internet connection. Plus you can share, rate, and review music all over the web from your Grooveshark profile page. Think MySpace, but just for your music library, that's totally fun to use.

And Grooveshark Lite? Well, it allows you to browse through millions of songs worldwide, make your own custom playlists, and get this — listen to them in their entirety without interruption. GSLite can even create playlists for you, which is a great way to discover new music. Just imagine browsing the world's iTunes libraries, and you'll get the idea. I'm so in love, I can hardly stand it.