Zenodo is an open dependable home for the long-tail of science, enabling researchers to share and preserve any research outputs in any size, any format and from any science.

Web of Science by Clarivate is a leading bibliographic database

Scopus by Elsevier is a major bibliographic database

Astronomy and astrophysics database that also indexes physics publications and arXiv e-prints

High Energy Physics Infirmation System

The major Open Access e-print archive

Contains journals, proceedings and standards by IEEE

Information on the peaceful uses of nuclear science and technology

Free access to patent documents worldwide

by the U.S. National Institute of Standards and Technology (NIST)

U.S. Department of Education Educational Resources Information Center.

Database for material properties