Worldcat - OCLC Firstsearch Union Catalog
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Large corpus of searchable texts includes British Philosophers (Francis Bacon, Thomas Hobbes, John Locke, George Berkeley, David Hume, Adam Smith, Edmund Burke, Jeremy Bentham, David Ricardo, John Stuart Mill), John Dewey, Immanuel Kant (in German), Hegel (Oxford Translations), Friedrich Nietzsche(in German) and Rene Descartes (in French)

Contains the full text of current, recent, and back issues of 30 philosophy journals.

The world's leading bibliography of Medieval Studies, covers Europe, the Middle East, and North Africa. The database comprises over 300,000 articles derived from some 4500 periodicals and thousands of volumes of conference proceedings, essay collections, Festschriften, and exhibition catalogs. The IMB English Online (available as a separate file) contains only bibliographic data for articles written in English.

A compendium on the histoy of western thought, originally published in 1973-4, that has, itself, become a classic. Among its contributors: Isaiah Berlin, George Boas, Herbert Butterfield, Merle Curti, Mircea Eliade, Joan Kelly Gadol, Sidney Hook, Milton Konvitz, Leonard Kreiger, Judith Shklar, Peter N. Stearns, and Reni Wellek.

-from Oxford Reference Online
An authoritative and up-to-date concise dictionary of philosophy.

Covers the history of philosophy worldwide. It includes over 2,000 entries on topics in ethics, aesthetics, social philosophy, political philosophy, epistemology, metaphysics, logic, and philosophy of mind as well as material on the philosophy of law, religion, science, history, language and education.

-from CogNet
A comprehensive reference work covering the field of cognitive sciences and its relationship with contributing disciplines: philosophy, psychology, neurosciences, computational intelligence, linguistics and language, and culture, cognition, and evolution.

This "dynamic reference work" is a publishing project of the Metaphysics Research Lab at the Center for the Study of Language and Information (CSLI) at Stanford University

Medieval (400-1500) and Renaissance (1300-1700) studies

Provides indexing and abstracts from books and journals of philosophy and related fields. It covers the areas of ethics, aesthetics, social philosophy, political philosophy, epistemology, metaphysics, logic, and philosophy of mind as well as material on the philosophy of law, religion, science, history, language and education.

A part of the Web of Science database, this is an important index to 1,160 of the world's leading arts and humanities journals, as well as selected items from over 6,000 scientific and social sciences journals, with coverage back to 1975.

The TLG was founded in 1972 to digitize the entire corpus of Greek literature from Homer to the fall of Byzantium. It now includes over 6,500 works by over 1,800 authors and is fully searchable online. Users who wish to save search results/settings need to create an account on the website.