Packaging Egg Box - No, it isn't software exactly. But it is a great example of a design that works well at revealing the beauty and nature of the content to the user rather than hiding it, which is what UX design ought to do more.
How to hide emergency money. Take your empty chap stick container and pop off the bottom taking all the insides out and then glue the bottom back on. Perfect for some extra cash at the beach.-- Great idea it only i didn't always loss my chapstick