Requiem is an application that works on all platforms and it removes the DRM on (purchased) videos and music in ITunes. The application can be downloaded from this torrent. This is of course something Apple is not happy about, so therefore each version of ITunes works on a specific Requiem version. Thankfully the developer of Requiem updates the application to match changes made by Apple.
Now, the torrent link will soon be outdated as new versions of ITunes and Requiem is released, so therefore I also supply the search that will find the latest release of Requiem. Enjoy!