Khan Academy
Khan Academy: The Historical Buddha
Among the founders of the world's major religions, the Buddha was the only teacher who did not claim to be other than an ordinary human being. Read about his life in this article.
Other
West Virginia University: A Summary of Native American Religions
This is an excellent introduction to Native American religious beliefs and practices. Includes an explanation of the major Native American Religions and their history. Site is extensive and exclusively text-based.
A&E Television
History.com: 8 Famous Figures Who Believed in Communicating With the Dead
Spiritualism's popularity waxed and waned throughout the 19th century and the first decades of the 20th century, and surged on the heels of major wars and pandemics. While belief in an afterlife is a cornerstone of many ancient and...