Religulous. Bill Maher's irreverent look at religion in general from an agnostic point of view. Not for the faint of heart, watch at your own risk. Don't write me angry comments for posting this since you've now been warned. I do happen to agree with his questioning religious views, and even though this film slants more towards mocking believers instead of dialoguing with them, I still think this film is worth watching. There is strong language and nudity. Now you've been warned twice.
Jesus Camp. Film about a Pentecostal summer camp for kids
Muhammad-Legacy of a Prophet. A beautiful film on the life and struggles of the Prophet Muhammad. Breathtaking, informative, and a must see for Christians.
Children of Abraham. A three part series which takes a look into Abraham and the three Monotheistic faiths which claim him as their founder. Part 0ne, two, and three.
There are plenty more out there worth watching, including one I'll be posting tomorrow on homosexuality, but this should be enough to keep the curious entertained for now.
Peace and blessings.