Deutscher Bildungsserver [Datenbank]  

The German Education Server is an information portal on the German federal education system supported by the federal and state governments.

GESIS [Datenbank]  

The social science research offering focuses on the digital, preferably free availability and reusability of publications (Open Access) and research data (Open Data) as well as related information. The offers on research data, survey instruments, publications, and other information can be searched across all GESIS databases via an integrated GESIS-wide search. Links between contents are also displayed so that, for example, matching publications to research data found can be seen directly.