Springer Materials : from the Landolt-Börnstein New Series, the Linus Pauling Files and other integrated resources [Datenbank]  

SpringerMaterials provides access to curated data on 3000+ physical and chemical properties of 250,000+ materials and chemical systems. Material classes: metals, alloys, ceramics, glasses, polymers, organic substances, atoms, nuclei. Data sources currently include the Landolt-Börnstein New Series, the Linus Pauling Files and specialized databases on thermophysical properties, polymer thermodynamics, adsorption isotherms, and 32,000+ substance profiles.

ZBMATH : the first resource for mathematics [Datenbank] /  

The Zentralblatt MATH Database contains more than 3 million bibliographic entries with reviews or abstracts drawn from more than 3500 journals and 1100 serials and covers the period from 1826 - present by the integration of the Jahrbuch database (JFM). Zentralblatt MATH covers all areas of pure and applied mathematics and history of mathematics.