I’ve been using this “to-do” list for a few weeks now, and am really happy with it. The main thing that makes it great is that it is pretty easy to integrate into Google Calendar, which I constantly use. Now I can see my to-do’s for any given day right on my Google Calendar. You can add, edit, and mark completed all from Google. Beyond that, it has nice features like iTouch application, different categories and priorities, etc.