University of Chicago
University of Chicago Library: Religion in the Lives of Ancient Egyptians
A good description of the religious practices of the ancient Egyptians along with a selection of images.
Other
Bradshaw Foundation: Egyptian Gods and Goddesses
Sixteen Egyptian gods and goddesses are listed, accompanied by pictures and explanations of their roles.
Other
Ancient Egypt: The Mythology: Headdresses of the Gods
A useful reference chart showing simple drawings of the distinct headdresses of major Egyptian deities.