ActionFocus is a todo app that implements a timer that helps you use the time management methodology known as "Auto Focus". (Which recently was revised into SuperFocus)
I won't describe the system to you. The idea basically is you feed all your to-do lists / tasks to the app, one at a time. Then you scan through the list, either do, or skip. When you decide to do the item, hit "play / start". If it's not finished, hit pause, then go onto next item. So on and so forth. The app looks plain, but then so is the system, and they do work pretty well.
Rating: Try it
http://www.appbrain.com/app/actionfocus/megaup.ActionFocus