GRIDSCAPE™ Peg Board Game Terrain
(Funding ends July 1st) - This one is almost done but we still have a couple of days. Cheap pieces that go into peg-board (like you hang tools on) to create dungeon terrain. More expensive than just buying a mat but so much cheaper than Dwarven Forge or any of the big name fancy ones.
I'm still trying to decide how much money to drop into this but I'm excited about it.