Perseus Atlas
perseus.tufts.edu
Map server gateway offering browsable maps of named places from the ancient world. Allows overlays of Roman provinces and modern boundaries, and comparisons against modern features and population centers.
Rome: Map Resources
dalton.org
Maps of the Roman Empire
Historic Atlas Resource - Europe
darkwing.uoregon.edu
Historical and Cultural Atlas Resource
Classical Atlas Project
unc.edu
The Barrington Atlas is a reference work of the ancient Greeks and Romans, the lands they penetrated, and the peoples and cultures they encountered in Europe, North Africa and Western Asia.
The Interactive Ancient Mediterranean Project
iam.classics.unc.edu
"IAM: an on-line atlas of the ancient Mediterranean world ... "
The Roman Empire
acs.ucalgary.ca
The Roman Empire at its Greatest Extent
Ancient Atlas - About.com
ancienthistory.about.com
A collection of annotated links for online maps of the ancient world and from antiquity.