MOOC (Massive Open Online Courses) e-learning sites.

Education sites which provide free online courses - at zero or minimal cost.

Khan Academy

A good free e-education site for Math, Science, Business, and more. You need to register and also help out with a modest donation if you can afford it.

London School of Economics

Massachusetts Institute of Technology (MIT) - Free Online Courses:

Very wide range of courses, and you can get certificates of completion for studies at a very modest cost.

Harvard ( Computer Programming)

Some Courses are not free