Digital libraries

Byterfly
DigitUnito
Europeana
Digital library that hosts, among others, the part of the digitalized collections belonging to BEM (Giuseppe Prato collection e Miscellaneous collection). It contains the digitization of some ancient and valuable holdings owned by University of Torino. Detailed information about the collections is available on the project website. It contains millions of documents (books and manuscripts, but also photos, paintings, TV programs and films, sculptures and handicrafts, diaries and maps, music scores and recordings, etc.).
Gallica
Google Books
OpenLibrary
Digital library of the French Digital Library and its partners.  Service that allows searching on bibliographic data, on parts of the text or on the entire text of millions of books. Internet Archive project that gives access to a wide series of digitized collections from all over the world.
Manuzio project
Project Gutenberg
World Digital Library
Digital library containing masterpieces of literature, manuals, dissertations, journals and other documents in electronic format. Allows access to a catalog of over 60,000 free ebooks. Digital library of the Library of Congress.