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  2. www.freefullpdf.comFind free PDF of scientific publications - FreeFullPDF

    Find free scientific publications in PDF format. Get more scientific data, share your articles & discuss with your scientific community. Register for free.

  3. unpaywall.orgUnpaywall

    An open database of 50,227,918 free scholarly articles. We harvest Open Access content from over 50,000 publishers and repositories, and make it easy to find, track, and use. Get the extension.

  4. scholar.google.comGoogle Scholar

    Google Scholar provides a simple way to broadly search for scholarly literature. Search across a wide variety of disciplines and sources: articles, theses, books, abstracts and court opinions.

  5. about.jstor.org › oa-and-freeOpen and free content on JSTOR and Artstor - About JSTOR

    How to find the millions of journal articles, ebooks, images, and other media available on JSTOR and Artstor as Open Access or free to everyone.

  6. doaj.orgDirectory of Open Access Journals – DOAJ

    DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online for everyone.

  7. sci-hub.seSci-Hub: making uncommon knowledge common

    Sci-Hub website. Get free access to academic journals. Download research papers for free from ScienceDirect, IEEE, Wiley, Springer, Nature and others.

  8. oa.mgOA.mg - Open Access for Everyone · Download and read over ...

    Free access to millions of research papers for everyone. OA.mg is a search engine for academic papers. Whether you are looking for a specific paper, or for research from a field, or all of an author’s works – OA.mg is the place to find it.