hope you all don't mind. little self plug on the subject - I also have an open source outliner here is the source http://github.com/hhuuggoo/efficiently http:

hope you all don't mind. little self plug on the subject - I also have an open source outliner here is the source http://github.com/hhuuggoo/efficiently http://github.com/hhuuggoo/efficiently and the demo: https://eff.iciently.com/docview/r/4ed70c031a7ba32edb000002/ https://eff.iciently.com/docview/r/4ed70c031a7ba32edb000002/ But this one is an app, not a plugin, so it might be less useful to some.