- Archive of Performances of Greek and Roman Drama (APGRD)
- Cantigas de Santa Maria online database and library (includes study and edition)
- Portuguese sources database and online library (including facsimiles) - PEM
- Databases on Hellenistic Athletes (336 – 30 BC)
- Heidelberg database. Roman Empire Inscriptions
- Beazley Archive
- Bernstein - The Memory of paper
- Bibliography on tuning and Musical temperament
- Library of Online Knowledge (b-on)
- Cairn
- Connected Contests in the post-classical world
- Corpus of Ancient Vases
- Corpus of Classical Arabic texts (KSUCCA)
- Digital LIMC
- Digital Prosopography of the Roman Republic
- Dionysos Lab. Digital Archive of Ancient Drama
- Directory of Open Access Journals (DOAJ)
- Early Music Sources (Fontes, Biblioteca e Iconografia)
- EBSCO - Library & Information Science Source
- EBSCO - The Philosopher’s Index
- EMERALD - British Food Journal
- Google Scholar
- JSTOR - Classical Studies
- NOMOI - A bibliographical web site for the study of ancient Greek law
- OpenEdition
- Eagle Project
- Facsimile and modern editions repository - IMSLP
- Rhetoric (appeals, branches, canons, figure catalogue, etc.)
- RIdIM - Association Répertoire International d’Iconographie Musicale
- RISM - Répertoire International des Sources Musicales
- Scientific Electronic Library Online (SciELO)
- Scopus
- Social Science Research Network (SSRN)
- Portuguese author theatre (16th century)
- Portuguese author theatre (17th century)
- The Oath in Archaic and Classical Greece
- Trimegistos: Papyrological and epigraphic resources from Egypt and the Valley of the Nile (800 BC - 800 AD)
- Watermark Databases
- Web of Science
