Laurel Bowman's CLASSICAL MYTH: THE ANCIENT SOURCES http://web.uvic.ca/grs/bowman/myth/
MYTHS AND LEGENDS: Christopher Siren's extensive metasite (not just for classical myth): http://pubpages.unh.edu/~cbsiren/myth.html
Ora Zehavi's MYTHMEDIA: a collection of images from western art for the study of myth: http://www-lib.haifa.ac.il/www/art/mythology_westart.html
Index of cybertexts (in English translation) by HESIOD (Theogony; Works and Days; Shield of Herakles) http://webatomics.com/Classics/Browse/browse-Hesiod.html
CLASSICAL MYTHOLOGY BY GEOGRAPHY: Mark Woon's clickable map that provides mythological information by geographic location (e.g. click on Troy for information about the Trojan War, Paris, Helen, etc.) http://www.princeton.edu/~markwoon/Myth/old-index.html
The Ambrose Collection of graphic images relevant to the study of myth. An extensive database. http://www.uvm.edu/~classics/mainpagelinks/ambrose.html
John Thorburn's locator maps for the study of myth and tragedy: http://www.webcom.com/shownet/medea/thorburn.html
ENCYCLOPEDIA MYTHICA (a resource on myth, folklore, and legend) http://www.pantheon.org/mythica/
Companion to Morford and Lenardon: http://longman.awl.com/mythology
Amazons in Greek Myth: http://www.eliki.com/ancient/myth/amazons/
Bulfinch's Mythology (annotated and hyperlinked) http://webcom.com/shownet/medea/bulfinch/welcome.html