FWIW, a related product, more general but less mature (I'm the author): http://onemodel.org/ http://onemodel.org/ (AGPL). Highly efficient at managing lists

FWIW, a related product, more general but less mature (I'm the author): http://onemodel.org/ http://onemodel.org/ (AGPL). Highly efficient at managing lists but doesn't yet share data between accounts except by exporting the data as txt or html. I use it heavily, daily, to manage checklists/tasks and notes on many subjects. 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' data, mobile, etc) Feedback or participation are appreciated. If one has any interest at all, I suggest signing up for the (~monthly?) announcements list at least.