EdX
EdX is the most sophisticated and academic free distance education platform, a joint project of MIT (Massachusetts Institute of Technology), Harvard University and UC Berkeley.
Continue Reading
Coursera
Coursera was founded in 2012 by two Stanford computer science professors, Daphne Koller and Andrew Ng.
ALISON
Alison is a free online educational platform that focuses primarily on professional skills. Alison currently offers 1,000 free online courses, nearly 13 million students and 2 million alumni from 195 countries.