Hats off to the developers at Taskade.

https://www.taskade.com

They literally just launched (Jan. 2017) but they’re already making good progress on spinning up a new simple collaboration tool to help users capture their thoughts, ideas and daily tasks. They would love your feedback. They have developed a Chrome Extension and seem destined to succeed.

https://goo.gl/WvT57L

You can instantly share and collaborate — no signups needed. See, for example, weekly tasks here…

https://taska.de/v/Hyfp7ZZ-tl

and their project roadmap here…

https://taska.de/v/SJGvDk8Ntx