Digitized materials from academic and special libraries worldwide.

Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 607 billion archived web pages. It is building a digital library of Internet sites and other cultural artifacts in digital form.

JSTOR is a digital library of academic journals, books, and primary sources - including OA materials. For researchers who are unafiliated with an institution that provides subscription access, perform your search first, then narrow the results using the left-side menu for "ACCESS TYPE: Content I can access."

Database of full-text OA books from more than 600 publishers.

More than 600 of its publications are Open Access (OA). View them here.