iTunes U

I love this. A gateway to knowledge and perpetual learning, from the best of places. Lectures in audio and video on everything and anything from (mostly) the worlds top universities.

Mathematics
Philosophy
Art
Architecture
Science
Language
Media Studies
Literature
Politics
Astronomy
Economics
Law
Design
History
Sociology
Theology
Linguistics
Programming

Ahh..one need never really go into a formal learning institution ever again. And it's all free. I urge any and all to make use of it. I think I should have done so ages ago myself.

Here's to lifelong learning!