COURSERA

Education for Everyone.

They offer courses from the top universities, for free.
Learn from world-class professors, watch high quality lectures, achieve mastery via interactive exercises, and collaborate with a global community of students...

Universities included are:-
1. Princeton University
2. Stanford University
3. University of Pennsylvania
4. University of Michigan
5. University of California, Berkeley

Subject Categories are:- 

1. Humanities and Social Sciences
2.  Computer Science

3. Mathematics and Statistics

4. Healthcare, Medicine, and Biology

5. Economics, Finance, and Business

6. Society, Networks, and Information