The first thing you'll probably notice, and possibly complain about, in the free online task manager TaskFive is that it limits you to five to-dos for each day. If you see that as more of a creative/realistic constraint than a hindrance, you'll probably like its other features. TaskFive sports a seriously clean design, with a one-week calendar view and simple click-to-edit tasks. You can set up SMS and email notifications for task due dates and daily agendas, and companies can set up group task calendars for multiple users—though TaskFive charges a per-user fee after more than two are added. For individual task management without too much fuss, though, TaskFive seems like a pretty great solution. TaskFive is a free service, requires a sign-up to use.