I liked Coherence quite a lot. I don't think it's been mentioned here, so: a small group of friends come together for dinner at the house of one of the couples, and meanwhile a meteor is passing Earth by. Suddenly there's a blackout and strange things start happening from then on. It's not a horror movie, but there's an atmosphere of tension and mystery.
I've read the use of a handheld camera throughout has annoyed some viewers, and I can see why, but luckily it wasn't an issue for me. Maybe the film starts a bit uneventful, but then it picks up and is worth watching.