We are very happy to hear that zbMATH, one of the most important bibliographic databases in the field of mathematics, is now freely available to all online. The database is run by FIZ Karlsruhe, the European Mathematical Society and the Heidelberg Academy of Arts and Sciences, and the funding to make it free to all was provided by the Joint Science Conference, the German national government organisation for science research funding and policy.
The database covers mathematics books and scholarly articles comprehensively since 1868, with some items from considerably earlier. It includes material from the paper abstracts journals Jahrbuch über die Fortschritte der Mathematik (1868-1945) and Zentralblatt für Mathematik (1931-2013). It can be searched by author and subject as normal, but also includes searching by mathematical formula and the subject-specific Mathematics Subject Classification. It includes not just abstracts, but independent reviews of the significance of important articles, although some of these are in German rather than English. It also has both forward and backward citation data. Where possible links to the online full-text item are provided.
The administrators are currently working on developing an API to allow content from zbMATH to be used in other digital information systems on an open access basis.
Anybody with an interest in mathematics is heartily recommended to try it out.