While this isn’t related to Ardour, I thought the audience here might find it interesting.
I built a web based tool for improvisation practice: https://improvizor.com/
Initially it was built to scratch an itch but I figured why not make it a bit more general purpose and put it out there. There are some usage ideas at the bottom of the page.
I have a few items on the todo list but thought I’d first see what people think.