If you are an author of some intellectual property, like software or music, you feel robbed when your creation is cracked, keygenned and distributed illegally. I know I do!
Crack tracker is a tool that scans popular filesharing websites and fishes out (suspected) illegal downloads of your products based on KEYWORD(s). It lists all known filesharing working addresses from sites like rapidshare.com. Then all you have to do is copy out the URLs and send a DMCA notice to have them removed.
Crack tracker will not eliminate software piracy by a long shot, but every little helps!
It is work in progress so your feedback is welcome.