Massive Open Online Courses (MOOCs) are free online courses available for anyone to enroll.
The main ones are FutureLearn, Coursera, edX and Open University
https://www.futurelearn.com/
https://www.coursera.org/
https://www.edx.org/
http://www.open.edu/openlearn/free-courses
What is a MOOC? Intro Video: https://www.youtube.com/watch?v=eW3gMGqcZQc
