HRD, yes, that's exactly right. Mormons are Christians, in that they follow the teachings of Christ, but they have some doctrines that are very contrary to the Catholic and Protestant sides of Christianity. I'm not an expert on Mormonism, so I may be butchering this, but I understand that they don't believe Jesus was the son of God in the same way that traditional Christians do. They believe he was a good man, and that by his goodness and self-sacrifice, I guess, he became a God. They believe that we can all, through following his teachings, or something, also become gods ourselves. Then they also have the extra-biblical Book of Mormon, where Jesus comes to America and visits the indians I guess. I'm sorry I haven't read it.
Edit:
It's actually wilder than I thought.
There are also Jehovah's Witnesses. They don't believe in the deity of Christ either, to the point that they have their own translation of the Bible where in John 1 it says "In the beginning was the word, and the word was with God and the word was
a god." Notice the "a" and the lower case "g." (
http://carm.org/religious-movements/jehovahs-witnesses/john-11-word-was-god)
I suppose that's why they're not technically called Christian faiths, but I'm not sure. I'll look more deeply into it tomorrow. Were there any others you were referring to that don't call themselves Christian?