(In no particular order)
Primary Resources
Perseus Project : Offers text like Homer’s Iliad and Hesiod’s Theogony
Internet Classics Archive : Includes translations of key works like the Odyssey
Theoi Greek Mythology : Extensive guide with primary sources, copyrighted images etc.
Secondary Sources
E. M. Berens’ Myths and Legends of Ancient Greece and Rome
Edith Hamilton’s Mythology with illustrations by Jim Tierney
Robert Graves’ The Greek Myths – Downloadable on the Internet Archive
Stephen Fry’s Mythos – Audio storytelling, narrated by Stephen Fry in two parts (7.5 hours each). Recommended age 14 and up.
Youth Resources
Ducksters Ancient Greek Mythology : An ambitious codex of information about the major gods two heroes. Great for curious minds!
Britannica Kids Greek Mythology : Available in three formats: for elementary, middle, and high school and up. Choose the material that fits you best. Subscribers get additional features, minimal advertising.
KidZone Greek Mythology : Gods, Heroes, mythical creatures and more, a great overview
Mr. Donn’s Ancient Greece : Tons of accessible reading materials, with some ads
Interpretive Resources
Interpretations of Greek Mythology by Claude de Warren : The primary influence of Epimythos’ interpretive verbose category
Chiron Communications : Stephen McFadden, New Mexico
Archaeological Resources
Perseus Project : Contains galleries of photos of art and archaeology
Beazley Archive : Focused on Greek vases