I LOVE Pontypool. It is a damn crying shame not many people know of it. Also not known, but awesome is DEADGIRL. I highly recommend that movie. A movie of what would two high school boys do with a hot zombie chick chained to a table? It's more sophisticated than it sounds.
Also, this is semi-known, but not well enough... House of the Devil. It rings true to the era of films by Roman Polansky. A classic babysitter in creepyhouse movie, but in a nostalgic and new refreshing way.
I'll see if I can think of more.