BASE ResearchBASE (Bielefeld Academic Search Engine) is an online search tool for open access resources and documents. Hosted at the Bielefeld University Library in Germany, BASE harvests its data from open access scholarly repositories.
Open DissertationsAmerican Doctoral Dissertations™ has been expanded to offer greater coverage of 20th Century research as well as access to full text. The enhanced database includes more than 153,000 theses and dissertations in total, including 70,000 new citations for theses and dissertations from 1902 to the present.
PaperityAlmost 5 million open access international scholarly papers
PubMed CentralOpen Access: PubMed Central provides National Institutes of Health (NIH) articles about biomedical and life sciences.
Science.govOpen Access to government scientific research and more.
Social Science Research Network (SSRN)Open Access world wide collaborative of over 301,700 authors and more than 2.2 million users that is devoted to the rapid worldwide dissemination of social science research.
Budapest Open Access Initiative
Open Access (OA) scholarship is research that can be read online for free without copyright restrictions. Reaching the broadest readership without preventing those who cannot afford the high cost of journal publication, is the OA Goal.