This is a list of no-cost sources that list or index electronic texts, including journal articles or reports. At these sites you'll find electronic books, journal articles, scientific and technical reports, conference papers, fact sheets, news transcripts, preprints, theses and dissertations. Many provide the full texts online, or abstracts, while others merely list bibliographic citations.

Employees of the U.S. Department of the Interior are reminded they may also search for journal articles by using EBSCO Online, GREENR, JSTOR, or Science Direct. 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 1,800 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.

  • E-Print Network
    Searchable gateway to preprint servers that deal with scientific and technical disciplines

  • EPA Scientific Inventory
    The Science Inventory is a searchable database of research products primarily from EPA's Office of Research and Development.

  • 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.

  • HathiTrust 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 - about OAIster
    Search 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).

  • 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.