Open Educational Resources (OER)

An open access e-print archive from Cornell University of over 10,000 articles in Math and over 1,000 articles in Computer Science.

CiteSeerX is a digital library and search engine focused on literature in computer and information science.

DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.

Browse the journals in OMICS International, which hosts hundreds of peer-reviewed open access journals in the sciences.

This is a library of open access scholarship in the humanities for free, for everyone.

Find freely accessible chemical information from authoritative sources.

Wiley Open Access publishes peer-reviewed journals in the sciences and social sciences that are freely available to read, download, and share.