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.

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

Web of Science by Thomson & Reuters is a leading bibliographic database.

Scopus by Elsevier is a major bibliographic database

Contains journals, proceedings and standards by IEEE and IEE

High Energy Physics Information System

The major Open Access e-print archive

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)

The NRAO Spectral Line Catalog is an attempt to collate, rationalize and extend existing spectroscopic resources for use by the astronomical community.

Astronomical data and related information: Simbad, VizieR, Aladin.

Data from ESO telescopes.

The Telescope Bibliography contains refereed publications that directly use ESO data.

Tool for researchers to gain access to images published in peer-reviewed journals.

Data on planets.

Free online registry for source codes that have been used in research that has appeared in, or been submitted to, peer-reviewed publications.

Comprehensive database of multiwavelength data for extragalactic objects.