2Do is described as 'Lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface and a comprehensive and flexible set of powerful features, it lets you focus on what's most important to you: your life' and is a popular todo list manager in the office & productivity category. There are more than 100 alternatives to 2Do for a variety of platforms, including iPhone, Android, Mac, Web-based and iPad apps. The best 2Do alternative is Super Productivity, which is both free and Open Source. Other great apps like 2Do are Todoist, Tasks.org, TickTick and Habitica.