De imperatoribus Romanis. A site containing scholarly biographies of the Roman emperors and their families, including stemmata and coinage.
Forum Romanum. An excellent place for students to begin their research on Roman topics.
Lacus Curtius. Bill Thayer's extensive and growing site, full of essential and esoteric information on the ancient world. Now with increasing numbers of dependably edited primary sources.
Stoa Consortium. A digital place for Classicists to meet.
VRoma (Virtual Roma). A virtual community for teaching and learning Classics, including virtual tours of the city of Rome.