Called "Frostwire" it looks and feels 101% identical to Limewire and even picks up your incomplete DL's directly out of Limewire (started one of mine immediately on initial launch). For a minute, you'd probably never notice it's a different application if it weren't for the icy-blue function buttons on the preview player, and the fact that it says "Frost" in place of "Lime" throughout the entire program. It also cuts out all the ads when you start limewire err..Frostwire.
The advantage - Unlike Limewire, the super-turbo-riffic version (Limewire's premium version) is absolutely FREE!! As a matter of fact, it's the only version you can get, so now you can enjoy your DLs at the front of the download line, instead of waiting for busy hosts, or frequently needing more sources.
Screen shots (windows version shown):
http://sourceforge.net/dbimage.php?id=60195
http://sourceforge.net/dbimage.php?id=60193
Mac and Windows users can DL it here:
http://www.frostwire.com/static/downloads.html