ELECTRONIC TEXTS
Early Modern Philosophy
http://www.earlymoderntexts.com/
Online versions of works by Berkeley, Descartes, Hobbes, Hume, Kant, Leibniz, Locke, Reid, and Spinoza. Somewhat limited, historically, but still useful for assigning readings to students.
Essays in Philosophy: A Biannual Journal
http://www.humboldt.edu/~mfg1/opening.html
Features current issue of journal. Fully accessible. Issues focus on a single topic with a large number of essays. Great for going in-depth on a topic, if topic is one you want to study. Essays can be fairly technical. Also includes substantial number of book reviews. Useful for students and teachers.
Internet Sourcebook Project
http://www.fordham.edu/halsall/
This is an excellent site for elecronic historical texts from the ancient through the modern period. Based at Fordham University, New York.
Institute for Learning Technologies: Digital Texts Projects
http://www.ilt.columbia.edu/publications/digitext.html
Online versions of some of the great works in philosophy. Philosophers include Aristotle, Descartes, Hegel, Kant, Locke, Mill, Plato, and Rousseau. Also includes links to other digital text projects online. Great for assigning different reading to students.
John Locke
http://weber.ucsd.edu/~dmckiern/locke.htm
Site devoted exclusively to John Locke. Contains online versions of works. Good for assigning reading to students.
Philosophers’ Imprint
http://www.philosophersimprint.org/
Features philosophical essays. Most are fairly technical. Could be useful for higher level students or teachers for background or notes.
Stanford Encyclopedia of Philosophy
http://plato.stanford.edu/
Alphabetical entries on philosophers, terms, etc. Very useful for students and teachers. Articles can be fairly lengthy — great for research.
And now for something a bit fun: Beyond the Fringe on Oxford Philosophy, thanks to the wonders of Youtube.