iOS: CARROT seeks to bring more fun and character to your tasks. It turns to-do lists into a game by getting you to please a robot master with your accomplished tasks.
CARROT calls itself a "to-do list with personality". It appears as a more minimal HAL 9000-esque robot with character traits similar to GLaDOS, which is to say it's an intelligent circle that doesn't like you very much.
Of course, you can change CARROT's opinion somewhat by doing your work. Adding and completing tasks earns you favour and points. As you continue to perform well, you will gain levels in CARROT's mind. Gaining levels earns you some strange fortune cookies. If you don't do your work, however, CARROT's mood will change for the worse. In the beginning you are warned not to upset CARROT. That's a hornet's nest I have yet to kick.
CARROT isn't much different from your standard simple task list at the core. You get one list and you complete tasks with gestures. You can't have multiple lists, you can't categorise or tag, and you can't set deadlines. All you can do is add items to a list, much like you would with paper. This simplicity might be overkill for some, but for those of you who appreciate stark minimalism and want an extra kick in the butt from a sadistic robot, you'll want to give CARROT a shot.
CARROT: The Todo List with a Personality ($0.99) [iTunes App Store]