Peter Adamson, Professor of Ancient and Medieval Philosophy at King's College London, takes listeners through the history of Western philosophy, "without any gaps." Beginning with the earliest ancient thinkers, the series will look at the ideas and lives of the major philosophers (eventually covering in detail such giants as Plato, Aristotle, Avicenna, Aquinas, Descartes, and Kant) as well as the lesser-known figures of the tradition.
Be sure and check out the links tab for more resources.
Update: This weekend I am going to add a section on the right sidebar for online courses, podcasts, and the like. If there are any links to sources in those categories that you particularly like, please feel free to leave me a message or email me.
Update 2: While pulling together the list for online courses, I see The Leo Strauss Center has added audio recordings for Strauss' courses on Kant and Plato's Apology and Crito.