Ancient Sources
Perseus: The Classics Page at The Perseus Digital Library at Tufts University with texts (in modern translations and ancient original languages) and images from the classical world, as well as modern essays and arguments.
The Internet Ancient History Sourcebook at Tufts University has links to complete works of most major Greek and Roman authors as well as selections on specific topics.
The Internet Classics Archive at MIT.
Lacus Curtius: Into the Roman World has "27 complete works from antiquity," many with English translations.
The Latin Library: A very large collection of Latin texts, in Latin only.
Interactive Ancient Mediterranean pages on ancient abbreviations for when you find an abbreviation and cannot decipher its meaning.

Women
Diotima: Materials for the Study in Women and Gender in the Ancient World
Women's Classical Caucus

Abbreviations of Classical Journals
Classics Serial Guide at the University of Chicago Library. Just type in the abbreviation and the guide will give you the title of the journal.
Classics Journal Abbreviations from l'Année Philologique for English language journals.

Search Engines
GOOGLE: Good for general searches and searches for images.

Art
Museum of Cycladic Art, Athens. This is one of my favorite museums, and it has a fine website.
Art History Resources on the web has EXTENSIVE links to art oriented websites from prehistory to today.

Maps
Excellent maps available at the Rome Project at the Dalton School.
Excellent maps on the map page of the Interactive Ancient Mediterranean Project, enhanced and growing at the Ancient World Mapping Center with their maps for students map room. Links to more maps are also available at the Ancient World Mapping Center.
Some groovy interactive maps are available at the Mapping History site and the University of Oregon.

Local Colorado Classics and Ancient History
Lecture program for the Archaeological Institute of America in Denver
Lecture program for the Boulder Society of the Archaeological Institute of America.
Phi Alpha Theta, the History Club and Honor Society occasionally presents lectures in the Ancient World.

Fun
Read Oedipus' story written in license plates

Archaeological Excavations
The world is full of possibilities for archaeological excavations. These are only a few of many:
Castell Henllys, Iron Age to the Medeival period in England
Tropaeum Traiani, a Roman site in Romania

Rome
Stemmata of Roman Dynasties
De Imperatoribus Romanis: An Online Encyclopedia of Roman Emperors
Lacus Curtius: Into the Roman World
Tables of Contents for the Journal of Roman Studies (JRS).
The History Journals Guide with links to and info. about Roman History Journals.