I have modified the stock Cards Against Humanity PDF from http://cardsagainsthumanity.com/ to use all-white backgrounds, so I could print the cards with my inkjet printer and not cry for all the wasted ink.
Doing it was surprisingly hard: I had to use a combination of pdfedit and recolor.pl.
All credits for the original game go to the original authors, I just repainted the walls.
CAH_MainGame_AllWhite.pdf (Mirror 1)
CAH_MainGame_AllWhite.pdf (Mirror 2)
sha1sum is 602f8cbf92af1933e9613812e7610fa629c1a13f, have fun!