My 2c worth, I don't find Torrent sites themselves to be that useful, many of them rely on a Google API for their searches. So if I actually know the name of the software I'm interested in, then I find that Google gives a pretty much comprehensive result for any torrent I may search for.
Again, I agree with not going into the legality of torrents, much legally free software is available by torrent download, maybe the most widely available software on torrent delivery being many Linux variations. Apart from which, it's another debate altogether.