You can access millions of high-quality articles from peer-reviewed academic and clinical journals for free. Many funding bodies now insist that articles based on research that they have paid for must be made available for free for anyone to read and use. These articles are stored in thousands of different subject and organizational databases across the Web. There are a number of 'one-stop' search tools that will help you find articles on the topics that you are interested in. Take a look at our Open Access Resources tab in this guide to try some of these out.
Started in August 1991, arXiv.org (formerly xxx.lanl.gov) is an open access archive containing over 1 million eprints maintained by the Cornell University Library. Covered areas include physics, mathematics, computer science, nonlinear sciences, quantitative biology, quantitative finance, and statistics.
BMC has an evolving portfolio of some 300 peer-reviewed journals, sharing discoveries from research communities in science, technology, engineering and medicine. Its leading research journals include BMC Biology, BMC Medicine, Genome Biology and Genome Medicine, academic journals such as Journal of Hematology & Oncology, Malaria Journal and Microbiome, and the BMC series – 65 inclusive journals focused on the needs of individual research communities.
Europe PMC is a repository providing access to worldwide life sciences articles, books, patents and clinical guidelines. Europe PMC provides links to relevant records in databases such as Uniprot, European Nucleotide Archive (ENA), Protein Data Bank Europe (PDBE) and BioStudies.
NORA is the institutional repository for the research publications and research outcomes of NERC Research Staff in its four wholly owned Research Centres: the British Antarctic Survey, the British Geological Survey, the Centre for Ecology and Hydrology, and the National Oceanography Centre.
Public Library of Science (PLoS) was founded in 2001as a non-profit open access publisher, innovator and advocacy organization with a mission to accelerate progress in science and medicine by leading a transformation in research communication. Top scientists from more than 190 countries around the world have published with PLoS, among them 61 Nobel Laureates.
An open database of over 20 million free scholarly articles, Unpaywall harvests open access content from over 50,000 publishers and repositories, and makes it easy to find, track, and use. Its Chrome/Firefox extension allows you to "skip the paywall" on millions of peer-reviewed journal articles.