LimeWire is the world's most popular and most downloaded, free peer-to-peer file-sharing program. With over 100 million unique monthly users, as opposed to Ares free download, the Limewire software program is downloaded hundreds of thousands of times each and every day and it also boasts several million active users at any given moment. LimeWire uses the BitTorrent protocol as well as the Gnutella network to provide an unparalleled searches and download speeds to every user.
Recently, Limewire download has been redesigned, bringing it up to date and making it more "eye friendly". It's got a much nicer looking GUI than it has had since it's inception.
LimeWire also encourages legal downloads with the Limewire Download Store. Don't worry, you can still get unlimited free downloads. The library seems to be limited compared to competitor download stores, but it will of course get better with time.