How many different groups are there that base their teachings on the Book of Mormon and/or Joseph Smith?

I am aware of the Latter Day Saints and the Reformed Latter Day Saints, both of which, to my understanding, recognize the Book of Mormon as Scripture and follow the teachings of Joseph Smith. I have heard, though, that there are other groups as well. How many groups/denominations recognize the Book of Mormon as Scripture or follow the teachings of Joseph Smith? Also, who are they (What do they call themselves?)