A substitute for Limewire? Is there a better way to get music?

I was wondering if anyone had any P2P programs that they used to get music. I'm tired of Limewire and was hoping there was some software that was just for music. Something a little more refined and clean maybe. I'm not interested in paying for Itunes songs, so please save the preaching. My Ipod hasn't been updated in soooo long. I need more music!