Brill Open Access Publications
More than 600 of its publications are Open Access (OA). View them here.
Directory of Open Access Books
Database of full-text OA books from more than 600 publishers.
JSTOR Home
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."