Jack Lumber is an excellent game that arrived on iOS last year. It's reminiscient of Fruit Ninja, in that you drag your finger around the screen to chop through wood, though I think it's an improvement on Halfbrick's formula -- it's got a more complex meta game, and the mechanic is a little deeper as well (the action slows down when your finger touches the screen, allowing for different types of cuts and slashes). Jack Lumber is still available on iOS, but just in case you'd rather use a mouse than your finger, the game has just arrived on Steam as well.
The Steam vers