"Unrivalled in scope for over sixty years, this established reference work has been thoroughly updated for this edition to reflect modern scholarship. Written by distinguished scholars from around the world, it covers all aspects of the classical world from literature and history to religion, science, and archaeology."
A mega-resource for all things classical. This site includes links to electronic publications, bibliographical indexes, databases/web projects/and information servers, author specific web sites, professional organizations/projects/centers/other initiatives, plus a lot more.
Contains resources including primary and secondary texts, site plans, digital images, and maps. Art and Archaeology catalogs document a wide range of objects: over 1,500 vases, over 1,800 sculptures and sculptural groups, over 1,200 coins, hundreds of buildings from nearly 100 sites and over 100 gems.
A comprehensive web site for humanities research from the University of California, Santa Barbara (includes a link to classical studies resources). VoS emphasizes both primary and secondary (or theoretical) resources.