Tip: If you run into a paywall (or a site asking for money to read an article) try the Unpaywall browser extension, which looks for alternative access in Open Access repositories.
A community-curated online directory that provides access to high quality, open access, peer-reviewed journals.
SpringerOpen journals are made freely and permanently available online immediately upon publication. They are subject to high-level peer review, author and production services ensuring quality and reliability of the work.
Open access to 1,497,979 preprints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance, Statistics, Electrical Engineering and Systems Science, and Economics.
A peer-reviewed open access scientific journal published by the Public Library of Science (PLOS).
A repository for both working papers and accepted papers, devoted to the rapid dissemination of scholarly research in the social sciences and humanities; from Elsevier.
A preprint is a version of a scholarly paper that precedes its formal publication in a peer-reviewed journal. Some publishers allow preprints to be made available to the public, and many also provide links out to the final publication. Read more about preprints here.