Myths

Legends that convey social principles and are about heroes, religious figures, ancestors, or supernatural beings.

Resources in this category:

Encyclopedia Mythica
http://www.pantheon.org/

Encyclopedia of mythology, folklore, mysticism, etc. with hundreds of definitions of "gods and goddesses, supernatural beings and legendary creatures and monsters from all over the world." Mythologies covered include Chinese, Greek, Latvian, Norse, Persian, Roman and many more. Entries are browsable and searchable.

Sacred Texts: The Classics
http://www.sacred-texts.com/cla/index.htm

"This section contains texts from ancient Greece and Rome, primarily about Classical Pagan beliefs. However, any text which has survived from this period of antiquity is, by definition, a classic. Many of these texts were only saved from the flames of the dark ages in locations remote from Rome and Athens, such as the legendary city of Timbuktu in central Africa, Irish monastaries, and by Islamic scholars in centers of learning as Baghdad."

Sumerian Mythology FAQ
http://home.comcast.net/~chris.s/sumer-faq.html

Discusses the Sumerian cosmology and deities, and touches upon the parallels between Biblical and Sumerian literature.