LOL I thought this was spam when I first read the title... I use Limewire...it works wonderfully. There's Ares (pretty good), Ares Lite (so-so), Kazaa (sucks), Bearshare (decent). There might be some other one's but I don't know about them...sorry.
yes they are. kazzaa charges you for thier ad free version, so does bearshare, but not limiewire. its free. you can get a pro version but I think its 30 bucks.