Massive Open Online Courses (MOOCs)

https://www.udemy.com/
https://www.udacity.com/
https://www.coursera.org/
https://www.khanacademy.org/  

 

http://oreilly.com

https://www.packtpub.com

https://www.freetutorialsus.com
https://freevideolectures.com/subject/computer-science/
http://www.businessinsider.com/the-37-best-websites-for-learning-a-new-skill-2015-8?IR=T