Encyclopedia Mythica
http://pantheon.org/
"Mythology" covers myths worldwide; "Genealogy
tables" show the marriages and relationships between gods.
Mythweb
http://www.mythweb.com/
Click on the "gods" link, then choose your god from the
picture -- look at the link at the bottom of the page for who everyone
is.
Bulfinch's Mythology
http://www.sacred-texts.com/cla/bulf/index.htm
Notes and links on this classic book of mythology.
Classical
myth: the ancient sources
http://web.uvic.ca/grs/bowman/myth/
