The Haunted Dimensions site has paper models of three small crypts. The only downside of these is that the back of the crypts are defaced with site advertising. Still, there’s also a brick wall there that you can paste the crypts up against.
Horror
Dead of Night: Night of the Santa Claws Module
RPG Now has a free horror RPG module called Dead of Night: Night of the Santa Claws. It’s designed for the Dead of Night RPG, but no doubt could be modded for any other system.
Zombie Survival Guide
Danger 50,000 Volts: The Zombie Edition is a hysterical send up of both zombie movie culture and those second rate documentaries that show up on cable.
Renfield Card Game
Cheapass Games offers Renfield, a card game about parts, tools, gravestones and “yummy delicious bugs.”
Building A Burial Mound
Robet Spears has some instructions on builidng a burial mound in 25mm / 28mm scale. It’s the perfect thing for a horror game.