Maybe I am behind the times here as MIT released this in 1999, but it is awesome.
One of the worlds greatest universities releasing their educational content for anyone in the world to view, study, and better themselves free of charge.
the site is: http://ocw.mit.edu
they have a lot of content; video lectures, problem sets, lecture notes, and more. Topics from many departments; Mathematics, History and many more.
I can… Continue