I wrote a small iPhone app called Recurrences. It fills a niche that I’ve been needing– a todo list for things that never get done, they just get done for now. Like calling your mom or emailing friends. When you finish a task, you hit done and it moves to the bottom of the todo list. And every task always tells you how long it’s been since last you did it. Super simple, but it took me two days to write (and learn CoreData, which is pretty cool) and I’ll be happy if anyone else finds a use for it besides me.