I made https://zetabee.com/text https://zetabee.com/text (which many HN users currently use) to provide a similar nested-list interface with keyboard shortcuts,

I made https://zetabee.com/text https://zetabee.com/text (which many HN users currently use) to provide a similar nested-list interface with keyboard shortcuts, copy-paste across lists, and easy read-only sharing. Before that I made http://untodos.com http://untodos.com with 'now', 'soon', and 'whenever' lists but ZetaBee Text is a superset of untodos features so I don't use untodos anymore myself. I haven't made a "done" feature yet because I haven't found a good way to implement it for tasks at arbitrary depths. Check out the demo: https://zetabee.com/text/demo https://zetabee.com/text/demo (save is disabled for demo).