These seem to have reallytaken off in the last year or two. When once we simply had wikipedia now there are more and more websites offering free online courses, in serious subjects, taught by some very well qualified people. The latest one of these I've heard about is www.coursear.org which is offering a good few science and technology courses. The thing is it's gotten to the point that I can't keep track of them all. Anyone have any ones they'd particularly recommend? My only problem (yeah, a problem with free) is that the humanities and business subjects are lagging behind the science and technology subjects in courses available.