National Library of Medicine
The National Library of Medicine (NLM), on the campus of the National Institutes of Health in Bethesda, Maryland, has been a center of information innovation since its founding in 1836. The world’s largest biomedical library, NLM maintains and makes available a vast print collection and produces electronic information resources on a wide range of topics that are searched billions of times each year by millions of people around the globe.
PhilSci-Archive
PhilSci-Archive includes pre-prints of scholarly works in all areas of philosophy of science, including general philosophy of science, philosophy of particular sciences (physics, biology, chemistry, psychology, etc.), feminist philosophy of science, socially relevant philosophy of science, history and philosophy of science and history of the philosophy of science.
PLOS ONE
PLOS ONE is an inclusive journal community working together to advance science for the benefit of society, now and in the future. The research we publish is multidisciplinary and, often, interdisciplinary. PLOS ONE accepts research in over two hundred subject areas across science, engineering, medicine, and the related social sciences and humanities. We evaluate submitted manuscripts on the basis of methodological rigor and high ethical standards, regardless of perceived novelty.
PubMed Central
PubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
Science Direct Open Access
Open access journals and books from Science Direct.
Science.gov
Science.gov makes it possible for users to search over 60 databases, over 2,200 websites, and over 200 million pages of authoritative federal science information in many formats, including full-text documents, citations, scientific data supporting federally funded research, and multimedia.
BioMedCentral Open Access
BMC has an evolving portfolio of some 300 peer-reviewed journals, sharing discoveries from research communities in science, technology, engineering and medicine.
bioRxiv
bioRxiv (pronounced "bio-archive") is a free online archive and distribution service for unpublished preprints in the life sciences. Articles are not peer-reviewed, edited, or typeset before being posted online. However, all articles undergo a basic screening process for offensive and/or non-scientific content and for material that might pose a health or biosecurity risk and are checked for plagiarism.
Frontiers
Frontiers is a leading Open Access Publisher and Open Science Platform. Our journals are led and peer-reviewed by editorial boards of over 100,000 top researchers. Covering more than 600 academic disciplines, we are one of the largest and highest-cited publishers in the world. To date, our freely accessible research articles have received over 500 million views and downloads and 1 million citations.
National Academies Press
The National Academies Press publishes books & media issued by the: National Academy of Sciences, National Academy of Engineering and Institute of Medicine. It publishes 200+ authoritative, independently-researched books a year on a wide range of topics in science, engineering, and medicine.
National Center for Biotechnology Information
Bookshelf provides free online access to books and documents in life science and healthcare.