I'm looking for feedback for my side project, Sagefy. I've been working on Sagefy for a little over 3 years and finally have something to show! I describe Sagefy as an open-content adaptive learning system. You can think of Sagefy like a synthesis of "anyone can edit" from Wikipedia and adaptive learning systems like Aleks or Knewton.
Here's a short 3-minute explainer video: https://www.youtube.com/watch?v=HVwfwTOdnOE
All of the basic things are built, but Sagefy is still a little rough around the edges. You can try out a little course I've built in it, "Introduction to Electronic Music -- Foundation", at: https://sagefy.org/
Sagefy is completely free and open source https://github.com/heiskr/sagefy . I have no interest it turning this into any sort of commercial endeavour. If you're interested in getting more background, check out the Wiki at https://github.com/heiskr/sagefy/wiki . Or just ask :)
Let me know what you think! And thank you!