OPEN ACCESS JOURNALS
DOAJ - https://doaj.org/
SEMANTIC SCHOLAR - https://www.semanticscholar.org/
GOOGLE SCHOLAR - https://scholar.google.com/
NOPR - http://nopr.niscair.res.in/
Open Access Library- http://www.oalib.com/
SPRINGER LINK - https://link.springer.com/journals/a/1
BIO MED CENTRAL - https://www.biomedcentral.com/journals
SCIENCE DIRECT - https://www.sciencedirect.com/#open-access
SPRINGER OPEN - https://www.springeropen.com/all-subjects
JSTOR- https://about.jstor.org/oa-and-free/open-access-journals/
Hindawi: https://www.hindawi.com/journals/
Nature Publishing Group: https://www.nature.com/siteindex#journals-A