Hello,

I took 2 courses from Stanford Online, and it was a great experience.

https://lagunita.stanford.edu/courses

The courses are Free, majority Self paced, and you get a certificate of completion at the end for free. You can take the courses on Edx or Coursera, but you still take them on Stanford platform without any fees.

Are you aware of any other universities or platforms offering same features?

(Free, Self-Paced, and a certificate of completion)