- ACLS Humanities E-Book - A collection of over 5,400 seminal books in the humanities
- Early European Books - A collection works printed in Europe before 1701
- Early English Books - Contains every work printed in English from 1473 to 1700
- Eighteenth Century Collections - Over 180,000 titles (...)
- Nineteenth Century Collections - Focusing on primary source collections of the long nineteenth century.
- Past Masters - Complete works of selected masters.
- Loeb Classical Library
- Gallica
- Getty Research Portal - Digitized art history publications
- HathiTrust’s digital library
- Internet Archive Texts
- Project Gutenberg
- Zentrales Verzeichnis Digitalisierter Drucke