Ben Patey has put together a complete re-imagining of the original prop handouts and documents from the classic "Masks of Nyarlathotep" campaign from Chaosium. It's easily one of, if not the, greatest tabletop RPG adventure every produced. At the time of it's initial publication the extensive use of props was revolutionary, but the presentation quality of those items isn't up to modern standards. Mr. Patey's Kickstarter aims to change that.
High quality props will make "Masks" more immersive, taking an already great experience and turning the dial up to 11. And there's just so much stuff. Maps. Matchbooks. Telegrams. Newspaper clippings. Handwritten notes. Not to mention the very cool stretch and bonus material, like postcards, passports, and physical specimens.
This is the bread and butter of Propnomicon, and it's worthy of your support.