Omnium Gatherums

Diotima: Women and Gender in the Ancient World
This is an amazing site, beautifully organized, and filled with materials for studying women and gender issues in antiquity, including complete and partial e-texts, bibliographies, course syllabi, images, calls for papers, and links to many, many more sites.
Maria Pantelia: Internet Resources for the Classics
A comprehensive, well-organized collection of links to classical sites on the web.
ARGOS: Your Connection to the Ancient World Internet
This is a discriminating search engine for web materials in the classics. Rather than return all sites with, for example, the keyword "Plato," ARGOS "intelligently" distinguishes sites pertaining to the Greek philosopher from those that pertain to home automation systems or to secondary school software packages.
Voice of the Shuttle: Classical Studies
A compendium of sites of interest to classicists.
Ancient World Web
Julia Hayden's impressive collection of materials covering antiquities from all parts of the globe.
The Perseus Project
The fruits of a project begun more than a decade ago, this is a phenomenal site containing complete texts of all the most widely-read literature from ancient Greece, in both Greek and translation; complete on-line reference works including Liddell-Scott-Jones and an encyclopedia; hundreds of images of vases, statuary, and archaeological sites; excellent built-in search engines to enable you to do word or keyword searches across texts, art, and reference works.
Hellenic Ministry of Culture, National Archaeological Museum of Athens

Area-specific pages

Pindar Bibliography
Prepared by Ilja Leonard Pfeijffer of Leiden University.
Ancient Medicine
The place to start when you want to research a question about medicine in antiquity.
Papyrology Home Page
Links to all sorts of papyrology collections worldwide.
Duke Papyrus Archive
Another site to go to with papyrus questions.
Interpreting Ancient Manuscripts
This site provides a great introduction to the principles of textual criticism, for example, how to choose among conflicting readings in manuscripts. The site includes a nifty exercise for becoming acquainted with the hows and how nots of editing ancient manuscripts.
Worlds of Late Antiquity
"A home page for miscellaneous materials relating to the culture of the Mediterranean world in late antiquity (roughly 200-700 C.E.)" By James O'Donnell of UPenn.
Didaskalia Ancient Theater Today
As the name suggests, this is the site to visit if you're interested in ancient theater performance practices.
Greek and Latin Language Resources
From Tennessee.
Latin Language and Classics Studies
From Ohio University.
Cultures of the Book
By Jim O'Donnell, UPenn.
Getty Information Institute

Latin Resources

“Little Venture” Latin Pages
Latin grammar, etymology, the Roman Calendar and lots more.
Marcus Tullius Cicero
Good collection of links to the Roman orator's works, and extensive bibliographies.
Ovid Project
"The University of Vermont's rare book department contains an extensive collection of illustrated works of Ovid. Included are several editions of engravings by the 17th century German artist, Johann Wilhelm Baur, depicting 150 scenes from the Metamorphoses.
The Vergil Project
"A collaborative enterprise dedicated to collecting, creating, and disseminating resources for teaching and research about Vergil." By Joseph Farrell, UPenn.
Vergil's Home Page
A very useful and attractive "Pagina Domestica" for Vergil students, including bibliographies, texts and commentaries, discussion groups, teaching materials, and links to more Vergil sites. By Joseph Farrell, UPenn.
Links for Earlham Latin students, prepared by Liffey Thorpe

Mythology

MythMedia
Mythology in Western Art.
Classical Mythology by Geography
Classical Myth, The Ancient Sources
a superb collection of mythic figures represented in art and text by Laurel Bowman.
Mythology in Western Art Greek Mythology
By J. M. Hunt

Sexuality and Gender in Ancient Greece and Rome

Diotima: Women and Gender in the Ancient World
This is an amazing site, beautifully organized, and filled with materials for studying women and gender issues in antiquity, including complete and partial e-texts, bibliographies, course syllabi, images, calls for papers, and links to many, many more sites.
Zeus and Leda: the Sexuality Wars in Contemporary Classical Scholarship
Marilyn B. Skinner (University of Arizona) surveys the Foucauldian project as played out in classical scholarship, and offers some recommendations.
Review Article/Discussion: The Social Construction of Homosexuality
by John Thorp, in Phoenix 46.1 (1992) pp 54-65.
HOW IS IT PLAYED? The Male Actor of Greek Tragedy: Evidence of Misogyny or Gender-Bending?
by Nancy Sorkin Rabinowitz (Hamilton College).
Positions for Classicists, or Why Should Feminist Classicists Care about Queer Theory?
by Kirk Ormand.

Classical Presses

TELA
Scholars Press WWW Site.
Loeb Classical Library
A guide to what's available from Harvard University Press's massive Loeb Library.
Thesaurus Linguae Graecae
Information about TLG.

Classical Associations and Organizations

Classical Association of Midwest and Southern States
A who's who and what's up with classicists in the midwest and south.
Women's Classical Caucus
A who's who and what's happening with the Women's Classical Caucus.
American Classical League