I’ll start by plugging Harvard’s free courses catalog as well as Udemy
Edit: Gonna add 2 more I remembered-
Blender - I wish I had more time to learn it, but I did start the infamous “Donut Tutorial” once!
Watch Cartoons Online - Lots of good older stuff!
AntennaPod for podcasts
It’s great, customizable, I sent a suggestion to the volunteer development team, and they made it happen.
I second this one. Only one I’ll use.