The aim of the Directory of Open Access Journals is to increase the visibility and ease of use of open access scientific and scholarly journals thereby promoting their increased usage and impact. In short a one stop shop for users to Open Access Journals.
Science.gov is a gateway to authoritative selected science information provided by 14 U.S. Government agencies, including research and development results.
Multi-disciplinary full-text database, with more than 8,500 full-text periodicals, including more than 7,300 peer-reviewed journals. Includes searchable PDF content going back as far as 1887.
