Comment by jkozera

http://zestdocs.org/ is my old project I've abandoned with similar idea. If anyone feels like continuing/rewriting, or perhaps even taking over the domain, GitHub organization, macOS app, or whatever really, you can email me via hn at the website's domain. (Note that I've set up the MX records there only a few minutes ago, so it may take some retries to be able to reach this email.)