I really, really want something like this as a desktop, fully native app, for personal use, and maybe with Groove-like peer to peer sync for small, closed groups.
Groove is one of my favorite examples of the damage done by Microsoft in the 90's. That product would STILL be useful today, 20 years later. I still wonder: Did Ozzie make the product just to get acquihired?
Is there anything that does this out there? EDIT: Now that I think about it, maybe OneNote does this in the background.