Task Coach is described as 'Simple open source todo manager to keep track of personal tasks and todo lists. It is designed for composite tasks, and also offers effort tracking, categories, notes and more' and is a very popular todo list manager in the office & productivity category. There are more than 100 alternatives to Task Coach for a variety of platforms, including Windows, iPhone, Android, Mac and Web-based apps. The best Task Coach alternative is Todoist, which is free. Other great apps like Task Coach are Workflowy, Wekan, TickTick and Markor.