So Bittorrent has been around for quite awhile now..
A lot of "releases" are just things people found on torrent sites so here.. learn to torrent if you want & you'll find a lot of things yourself :-)
Realize one very important thing.. the torrent community has the potential to put you & your machines in contact with some terrible stuff..
You can & will definitely find a lot of garbage there.. infected files.. non working stuff.. tread carefully.. just because it's a crack doesn't mean anything & everything is a false positive.
Intro: http://www.slyck.com/bt.php
Clients: http://www.slyck.com/bt.php?page=2
Sites to search for torrents: http://www.slyck.com/bt.php?page=3
If you're on a computer you can't or don't want to install anything on.. here's a portable client: http://www.binarynotions.com/halite-bittorrent-client/