Task Office: to-do, calendar is described as 'Task Office - existing GTD, to do lists, projects and contacts management apps.
Designed to make business planning, scheduling and getting things done more efficient.
Task Office makes your plans clear and achievable' and is a todo list manager in the office & productivity category. There are more than 100 alternatives to Task Office: to-do, calendar for a variety of platforms, including iPhone, Web-based, Android, Mac and iPad apps. The best Task Office: to-do, calendar alternative is Todoist, which is free. Other great apps like Task Office: to-do, calendar are Workflowy, Quire, Microsoft To Do and Remember The Milk.