Do you want a cool way to pick students in your class? To keep score during group activities? How about creating your own word magnets with a custom background? If you are interested in any of these things you have got to check out http://www.triptico.co.uk/. You can download it for FREE!! It works great with an interactive whiteboard and you can use it even if you don't have access to a interactive board.
Check out this video from the creator.