is your tool to jointly work on a list, without need for registration etc. Organize an event, create a shared shopping list, jointly work on a school project, arrange a pizza session, collect data from various people, split a bill, create a joint list of everything - all this and much more is possible. Create a list, share it and let your friends edit/extend it. See more details at this site
Just try it. And contact me if you have an interesting usage scenario. You can of course use Dozilla.io
for your own to dos as well, without sharing a list...