Good Todo List Managers?

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Anyone got any advice on some useful todo list managers? So far I've tried numerous ones, as listed below: Todoist http://www.todoist.com/ - This one is online and you can create tasks and subtasks, which makes it quite versatile. However, the very fact that it was online made it cumbersome, as my internet access is sporadic at best. Todolist - This one is one that you can download. At first glance the interface looks slightly annoying, but it gets better as you get used to it. It's currently my primary task manager, as it also allows the creation of tasks and subtasks Gmail - I've used Gmail as a todo list for some time, as it allows easy uploading of events to Google Calendar. It works as a very nice online alternative to Outlook. My main problems with it were the inability to create subtasks. Granted, its primary purpose is email, so of course I can't expect everything... Anyone use any others they'd like to recommend? I'd welcome a program that works faster than Todolist.