Databases

Ingenta
Article citations in a variety of subject areas and tables of contents for periodicals.
INSPEC
Articles and other documents in physics, engineering, computer science, information technology and manufacturing.
International Bibliography of Art
Contains citations to contents of over 500 journals, monographs, essay collections, conference proceedings and exhibition catalogues covering European art from late antiquity to the present, American art from the colonial era to the present, and global art since 1945
International Pharmaceutical Abstracts
Provides worldwide coverage of pharmaceutical science and health related literature. Includes citations for a wide range of drug therapy and pharmaceutical information, as well as for legislation, regulation, technology, biopharmaceutics, and ethics as they relate to pharmaceutical science and practice.
iPoll
A comprehensive database of public opinion information, containing more than 600,000 questions and answers asked in the US since 1935 from every major survey organization. Includes access to the full datasets on archived surveys.
ISI Web of Knowledge
Access to the Science, Social Science and Arts & Humanities Citation Indexs; also the Journal Citation Reports.
Iter Bibliography
Secondary source material pertaining to the Middle Ages and Renaissance (400-1700), including  citations for books, journal articles, dissertation abstracts, conference proceedings, festschriften, encyclopedias and exhibition catalogues.
Iter Italicum
Iter Italicum is a finding list of previously uncatalogued or incompletely catalogued Renaissance humanistic manuscripts found in libraries and collections around the world.  It is a tool for any scholar working in the fields of classical, medieval and Renaissance studies.