网易公开课 https://open.163.com/
课程图谱 http://www.coursegraph.com/
MIT OCW https://ocw.mit.edu/courses/
学堂在线 https://next.xuetangx.com/
Coursera https://www.coursera.org/
Code School https://www.pluralsight.com/codeschool
edX公开课 http://www.edx.org/
网易云课堂 https://study.163.com/
Udacity https://cn.udacity.com/