An alternative to the EBSCO version of MathSciNet. This searches the same publications as the EBSCO version but is harder to search because it automatically searches for phrases. However, it includes some additional features, including an author index and citation counts. Under 'Free Tools' is the Mathematics Subject Classification list and options to search for recently indexed publications.
Provided by the American Mathematical Society (AMS). Contains references and, in most cases, summaries for journal articles, books and conference papers in the mathematical sciences, from 1940 to current. Over 100,000 new items are added each year and most are classified according to the Mathematics Subject Classification.