Hmmmmmm, not sure of the morality of this one. But there is http://astalavista.box.sk/
then there is usenet and all the off shoots of alt.2600. the the p2p networks kazaa, shareaza etc. etc. I would advise caution in excecution though and scan everything with a virus checker first.
I would never advocate defrauding large multi-billion dollar companies, out of their well deserved income. Much better that they get to spend their money on private jets, expensive real-estate and Colombian marching powder.
However, I have heard that if you were to type in say "Photoshop" +"serial number" into Kazaa Lite, you may well be surprised by the returns you get.
Try to download small txt files, avoid .exe files and always check with a virus scanner. (You ain't seen me roit?).