Mass Online Open Courses
Edx
Here you will find Harvard, MIT, Berkeley and many others.
Coursera courses
Here you will find Yale, University of London, University of Washington and many others.
Udacity
Here you will find many British Universities.
Every major university in the world offers Moocs. Before they offered OCW's, which was open course ware. These are similar, except here you study like you study at University and get a certificate.
