FWIW, a related product, more general but less mature (I&#x27;m the author):   <a href="http:&#x2F;&#x2F;onemodel.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;onemodel.org&#x2F;</a> (AGPL).  Highly efficient at managing lists but doesn&#x27;t yet share data between accounts except by exporting the data as txt or html.  I use it heavily, daily, to manage checklists&#x2F;tasks and notes on many subjects.<p>I see it as the beginning of a platform to change how individuals (or mankind) manage knowledge overall. Future features involve exploiting the internals for collaboration (linking instances, sharing data, subscribing to each others&#x27; data, mobile, etc)<p>Feedback or participation are appreciated. If one has any interest at all, I suggest signing up for the (~monthly?) announcements list at least.