One of my baby projects with android: a straight-forward tea timer. I was totally unimpressed by the lack of simple timers (with reasonable user interfaces) in the android market, so I wrote my own. To my surprise, it's taken me much longer than one would expect to get everything right, and it's still a work in progress.
This project is open source, and demonstrates many beginner android topics, such as: XML layouts, services, drawing, localization, handlers, and more! Access the code via
GitHub