For Cthulhu fans, here are some paper figures of an Elder Thing and Investigators.
Here are some paper figures of cowboys for your 28mm wild west games.
Here are some downloadable paper miniatures for an old Japanese console game called Suikoden. They’re perfect for an anime style game.
Dream Weaved Worlds has some very nice free print-and-play dungeon tiles.
The Japan Agency of Marine Earth Science and Technology offer a page of free, downloadable paper models of sea creatures and research vessels. Properly scaled, they might be useful for a Thunderball type skirmish game, if anyone ever makes a few 28mm 1960s era scuba diver.