Online Course Providers - Mostly Free

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TAke a look at some of these providers of Online Courses (so-called MOOCs), most of whom are offering them for FREE, though some of have restricted dates of joining:

 
https://www.edx.org/

https://www.coursera.org/
 
https://www.udacity.com/
http://www.apple.com/education/itunes-u/
 
https://www.canvas.net/
 
https://www.udemy.com/
 
http://www.lynda.com/
 
http://www.thegreatcourses.com/
 
http://www.recordedbooks.com/index.cfm?fuseaction=scholar.course_list