Open and free content on JSTOR and Artstor

Their partnerships with libraries and publishers help make content discoverable and freely accessible worldwide. 

WorldCat

WorldCat is the world's largest network of library content and services. WorldCat libraries are dedicated to providing access to their resources on the Web, where most people start their search for information. WorldCat.org lets you search the collections of libraries in your community and thousands more around the world. WorldCat grows every day thanks to the efforts of librarians and other information professionals.

ERIC 

(Education Resources Information Center) is an authoritative database of indexed and full-text education literature and resources. Sponsored by the Institute of Education Sciences of the U.S. Department of Education. 

World Digital Library

The World Digital Library (WDL) is a project of the U.S. Library of Congress, carried out with the support of the United Nations Educational, Cultural and Scientific Organization (UNESCO), and in cooperation with libraries, archives, museums, educational institutions, and international organizations from around the world. The WDL makes available on the Internet, free of charge and in multilingual format, significant primary materials from all countries and cultures.

Library of Congress

Search millions of items in many formats and languages. Explore a growing treasury of digitized materials. Consult with staff online or in one of the research centers to find what you're looking for.