Websites of universities offering free courses open access:

1. https://ocw.mit.edu/
2. https://online.stanford.edu/
3. https://www.open.edu/openlearn/
4. https://open.uci.edu/courses
5. https://pll.harvard.edu/catalog/free
6. https://open.umich.edu/
7. https://www.open.ac.uk/