Free online learning from the Open University (UK). https://ounews.co/around-ou/university-news/lift-in-visitors-to-ous-one-stop-shop-for-free-learning/
This had been around for a fair few years now. When I was doing my MA there it was quite surprising how much of the material was still in use on some courses just slightly repackaged. It's a really great way though to see if something is what you want to study.