The first movie is called "Lo." It's hilarious. OMG. Anyone contemplating summoning and revocatory work needs to watch this. Just ignore the references to heaven/hell. I didn't particularly care for the very ending, but this movie gives one of the best indications of what it's like dealing with a certain cadre of spirits. A trailer for "Lo" can be found here: http://youtu.be/XhFsK7e8wUo
The second movie is called "Ink." This one stayed with me for quite awhile after watching. I'm not going to say anymore, but if you have a spirit worker in your life, or you habitually deal in some way with the spirit world, watch this movie. It has its own self-contained cosmology and it's really brilliantly done. The trailer is here: http://youtu.be/ZBGeErufQdY (the full movie is also on youtube).
Both movies are available on netflix instant demand.
I don't often watch or recommend movies but these were too good not to share.