Rome and Roman History and Archaeology

Roman Republic (Livius: Articles on Ancient History)
Roman Empire (Livius: Articles on Ancient History)
Byzantium (Livius: Articles on Ancient History)

Digitales - Forum Romanum
Stanford Digital Forma Urbis Romae Project
Lanciani's Forma Urbis Romae
Samuel Ball Platner, Thomas Ashby, A Topographical Dictionary of Ancient Rome
Digital Augustan Rome
Ara Pacis Augustae
Digitale Topographie der Stadt Rom (Chrystina Häuber)

Digital Hadrian's Villa Project

Encyclopaedia Romana
History of Ancient Rome (UNRV)
Digital Prosopography of the Roman Republic
Republic to Empire

Fasti Online
Rome Project

De Imperatoribus Romanis: An Online Encyclopedia of Roman Rulers and Their Families
Roman Legions (The Roman Military Museum)
Roman Legionary Fortresses
Price Edict of Diocletian
Tabula Imperii Byzantini (TIB)

Roman Empire. University of Oxford. Podcasts
Roman Britain. University of Oxford. Podcasts
Rome. University of Oxford. Podcasts