http://lecturefox.com/ has a number of them listed, from several major universities.
When looking at the lecture on the University's site, check, I know that Lecturefox doesn't list all 1800 MIT courses available.
Subjects do include programming, computer sciences, physics, mathematics, philisophy....
There are a lot of them that can help any of us to improve our skills programming in general, or even on a specific project where we are dealing with a very specialised field of knowledge.