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STEM - Free & Open Access Resources

arXiv, ChemRxiv, bioRxiv, and More

Preprint servers are open repositories where researchers can deposit their preprint, the version of the article that has been submitted for publication and has not yet been peer reviewed. If the preprint has since been peer reviewed and accepted for publication in a journal, there should be a link from the preprint to the article (which may or may not be paywalled) on the publisher's website.

Repository Covers
arXiv link 1.8 million preprints in physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics
ChemRxiv link Preprints in the chemical sciences
bioRxiv link Preprints in the biological sciences. (For COVID-19 preprints)
medRxiv link Preprints in the health sciences. (For COVID-19 preprints)
Preprints in agriculture and allied sciences
Preprints in earth sciences and related planetary sciences.