Cheddar is described as 'Keeps your world organized. It's easy to use on your iPhone, iPod touch, iPad, and on the web. Cheddar is super simple and instantly in sync on all of your devices' and is a todo list manager in the office & productivity category. There are more than 100 alternatives to Cheddar, not only websites but also apps for a variety of platforms, including iPhone, Android, Windows and Mac apps. The best Cheddar alternative is Todoist, which is free. Other great sites and apps similar to Cheddar are Workflowy, Microsoft Outlook, ToDoList and Org mode.