Ciro Santilli Moodle instance of the Mathematical Institute of the University of Oxford.
Has a mixture of open access and closed access. But at least it can have open access unlike the in-house systems such as Canvas where everything is necessarily paywalled!
Sometimes things appear open but don't show any meaningful content if you are not logged in, which is annoying.
But at least it gives a clear public course list, thing that certain departments (cough Department of Physics of the University of Oxford cough).
The organization is a bit crap, when you expand e.g. C Michaelmas term it shows nothing, just a search.
The way to go is via the year year categories e.g. "Year 2022-23": courses.maths.ox.ac.uk/course/index.php?categoryid=734. Term splitting is annoying, but one can stand it.
There seems to be no way to list all versions of a single course across multiple years besides just doing a search e.g.