[philipps]

Since you list other non-open source solutions as well in your question, I’ll mention one more, which might be the closest to what you are looking for > maven.com.

We started collaborating with them right after they launched, and just finished our first course on their platform.

I also wish there was a good open source alternative but the revenue sharing with maven is fair, the team is a joy to work with, and the product is improving rapidly.