Seconding WorkFlowy. I started using it a couple months ago and haven't turned back since. I showed it to my (not very technologically savvy) wife, and she love

Seconding WorkFlowy. I started using it a couple months ago and haven't turned back since. I showed it to my (not very technologically savvy) wife, and she loves it too. It's great for sharing the mobile interface is nice, and I like how simple it is. (sorry if this sounds like an advertisement but it's great to actually have a to-do list manager that I actually like)