Yesterday I discovered a really cool new Kickstarter. It involves a pair of standard regulation playing card decks, produced by Bicycle, with a Cthulhu theme. The artwork is beautiful and eerie and very much in the Lovecraft style.
The Kickstarter will produce two decks of playing cards (Elder Sign and Necronomicon) as well as all sorts of extras.
The image below shows the back of the Elder Sign cards.