What-Do? is described as 'Makes it easy to manage your todo items and tasks on a clean todo list so you can focus on what is actually important' and is a todo list manager in the office & productivity category. There are more than 25 alternatives to What-Do?, not only websites but also apps for a variety of platforms, including iPhone, iPad, Android and Mac apps. The best What-Do? alternative is Todoist, which is free. Other great sites and apps similar to What-Do? are Remember The Milk, Taskade, Things and OmniFocus.