As of 2021, mostly useless business courses: https://learn.saylor.org
One redeeming factor however: they have a GitHub: https://github.com/saylordotorgo
They seem to favor the dreaded CC BY-NC-SA.
The founder Sayler looks a bit crooked: https://en.wikipedia.org/wiki/Michael_J._Saylor#SEC_investigation, Rich people who create charitable prizes are often crooked comes to mind.