The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
A classic game of tic-tac-toe, Xs and Os brings you the ability to play against another person or against your iphone, without the hassle of a pencil and a piece of paper. It's the "Greenest" way to play today.