Mythweb
Mythweb: Theseus
Fun, illustrated trip through the story of Theseus from Greek mythology. Well-suited for younger audiences. Each page summarizes a part of the story along with a very eye-catching, animated illustration.
Encyclopedia Mythica
Encyclopedia Mythica: Greek People (Mythological)
Featuring the heroes, heroines, and mythical creatures from Greek legend, this site offers information on hundreds of characters, as well as etymology, pronunciation, pictures, and more.
Wikimedia
Wikipedia: Theseus
Detailed encyclopedia article about the Greek hero Theseus. It includes links to more information in addition to a summary of the myth.
Other
Mythology Guide
"We have collected information on Greek and Roman myths. You can find information on our selection of topics by clicking on the appropriate God or myth name below." Provides simply-worded yet detailed summaries of the major myths of the...