PLOS is a nonprofit, Open Access publisher empowering researchers to accelerate progress in science and medicine by leading a transformation in research communication.

Choose among free epub and Kindle eBooks, download them or read them online. You will find the world’s great literature here, with focus on older works for which U.S. copyright has expired. Thousands of volunteers digitized and diligently proofread the eBooks, for you to enjoy.

The Dag Hammarskjöld Library (the Library) creates content, data and metadata related to UN information, resources, publications, and documents. Our products include: bibliographic metadata, Index to Proceedings, Index to Speeches, Voting Records, UNBIS Thesaurus, research guides and frequently asked questions.

The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work.

DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals. DOAJ is independent. All DOAJ services are free of charge including being indexed in DOAJ. All data is freely available.

Getty Publications produces award-winning titles that result from or complement the work of the J. Paul Getty Museum, the Getty Conservation Institute, and the Getty Research Institute. This wide variety of books covers the fields of art, photography, archaeology, architecture, conservation, and the humanities for both the general public and specialists. Publications include illustrated works on artists and art history, exhibition catalogues, works on cultural history, research on the conservation of materials and archaeological sites, scholarly monographs, critical editions of translated works, comprehensive studies of the Getty’s collections, and educational books on art to interest children of all ages.

In 2014, Getty Publications launched its Virtual Library with more than 250 titles spanning its forty-year publishing history. Titles are searchable by title, author, and keyword and include full descriptions, tables of contents, links to read online, to purchase the print book, to find in a library, or to download the complete PDF for free for personal use (terms of use). Only those titles that could be offered in their entirety were included in the initial launch of the Virtual Library. More will be added as they can be made available.

The goal of Elephind.com is to make it possible to search all the world’s online historic newspapers from one place. We aren’t there yet, but we are adding more newspapers every day.

With Elephind.com it is now possible for family historians, genealogists, and researchers to search historic digitized newspaper archives from around the globe. Elephind.com is much like Google, Bing, or other search engines but is focused on only historical, digitized newspapers. It enables you to search, for free, across many newspaper sites simultaneously, rather than having to visit each site separately. By clicking on the Elephind.com search result that interests you you’ll go directly to the newspaper site which hosts that story.

Many of the smaller newspaper sites are not well known and may be difficult to find with the usual search engines but are searchable from Elephind.com

Open Library is an open, editable library catalog, building towards a web page for every book ever published.

Just like Wikipedia, you can contribute new information or corrections to the catalog. You can browse by subjects, authors or lists members have created. If you love books, why not help build a library?

Five decades of Met publications on art history, available to read, download, and/or search for free.

The Internet Archive, a 501(c)(3) non-profit, is building a digital library of Internet sites and other cultural artifacts in digital form. Like a paper library, we provide free access to researchers, historians, scholars, the print disabled, and the general public. Our mission is to provide Universal Access to All Knowledge.

The Library of Congress is the largest library in the world, with millions of books, recordings, photographs, newspapers, maps and manuscripts in its collections. The Library is the main research arm of the U.S. Congress and the home of the U.S. Copyright Office.

The Library preserves and provides access to a rich, diverse and enduring source of knowledge to inform, inspire and engage you in your intellectual and creative endeavors.

BASE is one of the world’s most voluminous search engines especially for academic web resources. BASE provides more than 150 million documents from more than 7,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.