We've covered our share of productivity apps, from the simple to the complex, and ToDone tends towards the simple. As a "to do" app for the iPhone and iPod touch, it offers all the nice things you'd want: a clean interface, simple method of data entry and a history of previous items. Sujal Shah will show you the app in action in the video below*. By the way, ToDone is free in the App Store!
*We've had some commenters ask about the use of Flash on these videos. We are using Brightcove, which defaults to Flash on the Mac, but on iOS will fall back to H.264 for playback. You will see this on your Mac if you block Flash or don't have it installed. - Ed.