Khan Academy: History of Philosophy
Topics from Ancient to Early Modern including Hume and Kant are discussed in short (10-15 minute) video tutorials
The Internet Encyclopedia of Philosophy
The Internet Encyclopedia of Philosophy was founded in 1995 as a non-profit organization to provide open access to detailed, scholarly information on key topics and philosophers in all areas of philosophy. The Encyclopedia receives no funding, and operates through the volunteer work of the staff, which consists of editors, authors, volunteers, and technical advisers.
Stanford Encyclopedia of Philosophy
Free online encyclopedia from Stanford University "maintained and kept up to date by an expert or group of experts in the field".
Philosophy Talk is a weekly, one-hour radio series produced by Ben Manilla. The hosts' down-to-earth and no-nonsense approach brings the richness of philosophic thought to everyday subjects.