Chore Wars is a highly amusing concept. It's basically an online chore list -- you get a certain number of points for each chore you do (you set up your own chores and point assignments). But the whole thing is wrapped in a Dungeons & Dragons sort of RPG concept. So you earn Experience Points for each chore, and you get assigned a different character class when you level up based on what types of chores you do. Best of all, you can randomly encounter monsters and find treasures. It's really cute and it works pretty decently as a chore tracker, too.
Of course, fairplaythings keeps stealing my chores in order to get the points, but I think that may be a feature, not a bug.