Great list. I would add hooktheory: 6. https://www.hooktheory.com/hookpad https://www.hooktheory.com/hookpad (interactive composition tool) 7. https://www.hoo

Great list. I would add hooktheory: 6. https://www.hooktheory.com/hookpad https://www.hooktheory.com/hookpad (interactive composition tool) 7. https://www.hooktheory.com/theorytab https://www.hooktheory.com/theorytab (searchable database of chord progressions in popular songs, playable in abovementioned tool) They also sell an interactive music theory primer, which I've not read, but everything else there is free (and amazing).