This is a list of no-cost sources that list or index journal articles or reports. At these sites you'll find journal articles, scientific and technical reports, conference papers, fact sheets, news transcripts, preprints, and dissertations. Some provide access to the full texts of articles and reports.

Employees of the U.S. Department of the Interior are reminded they may also search for journal articles by using Academic OneFile, EBSCO Online, or JSTOR. Most employees may search these databases at their desks, while others must come to the Library or contact a Reference Librarian for assistance.


    Database of citations to the agricultural literature created by the National Agricultural Library and its cooperators.

  • BioMed Central

    Publisher of more than 170 peer-reviewed open access journals.

  • Chemistry Central
    Chemistry Central is a new service publishing peer-reviewed open access research in chemistry, from BioMed Central.

  • Digital Book Index
    Digital Book Index provides links to more than 141,000 full-text digital books from more than 1800 commercial and non-commercial publishers, universities, and various private sites. More than 100,000 of these books, texts, and documents are available free.

  • Directory of Open Access Journals

    The most complete directory of open access journals, DOAJ (produced by the University of Lund Libraries) currently offers access to more than 5,000 journal titles and over 400,000 articles. It attempts to cover all subjects and includes journals that practice peer review; that do not charge readers or their institutions for access; do not use embargoes to restrict access for a period of time post-release; and, offer a majority of articles that report active research or are full-text reviews.

  • Environmental journals on the Internet

    187 journals are grouped according the amount of information provided on-line for free; maintained by the National Council for Science and the Environment.

  • E-Print Network

    Searchable gateway to preprint servers that deal with scientific and technical disciplines.

  • ERIC database

    Educational research reports funded by the U.S. Department of Education.

  • Federal R & D Project Summaries

    Federal R & D Project Summaries provides a portal to information about Federal research projects, complete with full-text single-query searching across databases residing at different agencies. It uses research summary and awards data from the Department of Energy, the National Institutes of Health, the National Science Foundation and other agencies.

  • GEOSCAN database

    Earth Sciences Information Centre (ESIC) of Natural Resources Canada, which has also made available the RESORS (REmote Sensing On-line Retrieval System) database of publications from 1950 to 1995.

  • Google Scholar

    From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations.

  • Hathi Trust Digital Library

    A joint venture of more than 25 large American university libraries. More than six million volumes have been digitized and posted; about half of them are in English. About 20% of the volumes are in the public domain with full text available. Each month thousands of additional titles are added. The interface is designed much like a library's online catalog, and provides for greater precision in searching than does the Google Scholar interface. One can search by author, title, subject, and more. Filtering options include date and language, and retrieved individual titles feature a faceted sidebar suggesting similar types of works.

  • Health & Environmental Research Online (HERO)

    Health and Environmental Information Online (HERO), a continuously updated database of sources considered for and/or used in human and ecosystem risk assessments, is prepared by the Environmental Protection Agency's National Center for Environmental Assessment.

  • OAIster

    A union catalog of digital resources, OAIster provides one-stop "shopping" for users interested in useful, academically-oriented digital resources, such as digitized (i.e., scanned) books and articles, born-digital texts, audio files (e.g., wav, mp3), images (e.g., tiff, gif), movies (e.g., mp4, quicktime), and datasets (e.g., downloadable statistics files).

  • Open J-Gate

    The portal provides access to English language articles from more than 4,300 online journals. Searches may be limited to peer-reviewed journals (which make up more than half the content) or to trade and industry publications.

  • PolicyArchive

    PolicyArchive attempts to be a comprehensive, searchable, open access, online archive of public policy research. A project of Indiana University-Purdue University's Indianapolis Library and Center for Governmental Studies, PolicyArchive includes reports, briefs, charts, videos, and white papers produced by think tanks, universities, governments, foundations and public interest organizations.

  • PubMed Central

    Free online access to the full text of life science research articles.

  • Quakeline database

    Covers earthquakes, earthquake engineering, natural hazard mitigation, and related topics.

  • is a gateway to authoritative selected science information provided by U.S. Government agencies, including research and development results.

  • Scirus

    Scirus is the most comprehensive science-specific search engine on the Internet.

  • SORA: Searchable Ornithological Research Archive

    An open access electronic journal archive and is the product of a collaboration between the American Ornithologists Union, the Cooper Ornithological Society, the Association of Field Ornithologists, the Wilson Ornithological Society and the University of New Mexico.

  • TRIS Online

    Books, journal articles, and technical reports on transportation research from the 1960's to the present.


    A global science gateway connecting you to national and international scientific databases. accelerates scientific discovery and progress by providing one-stop searching of global science sources.