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.
This washing powder packaging has been very popular. Now here's the rest of the story PD
Brilliant packaging designed to provide a more convenient way for fast-food industry. By Seulbi Kim, Rhode Island school of Design. Very clever PD