I can recommend Wunderlist, it's quite good for having shared lists etc.

Of course, there's the usual issue of managing the 'chattiness' of the app, but I use it instead of a calendar.

Have you tried Process Street?

Just looked it up. It looks interesting for a company that wants to run a process.

I was thinking more for individuals, and note that the key is having people remember things you may not. For example, if the list has something like check your roof for leaks if its been 15 years or something you may not think of.

It's also something I always wanted after reading that book.

Care to share what you found?

Sure. Well every to-do app has most of the functionality you need (Wunderlist is the one I like the best).

They have annual reminders so you can put a checklist for taxes or something.

BJ Novak has https://li.st/bjnovak/ which is a general list sharing app.

It has the social component that I think would be very useful applied to to-do lists.

Finally, there are ready made list apps which help you maintain your home, health, car, kids, wealth etc.

I wish there was a social market place like li.st for apps like Wunderlist with multiple lists to choose from.

Mulled this idea for quite awhile as the consumer version of an enterprise app I built. PM me if you'd like to chat more on it!

I used Asana when I had a huge trip to plan for and had checklists on top of checklists