MOOC websites have avoided to put a "Download All Course Material" option in the courses. Udacity came close to it, but you still need to browse all the lessons and download them individually. Coursera is even worse in this area.

I really get annoyed when someone has implemented a restriction in their product, while they know everyone can use IDM or even Python to automate downloading of the course material. (there are python tools for downloading coursera and edx courses.)

Even if the course is free, the internet traffic you use for it isn't, that's why I would really need the aforementioned option to download them in free-internet-download hours.