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.
Sustainable egg cartons made from heat pressed hay
Concept Branding and Packaging: ‘Beehive Honey Squares’. The use of yellow on the outside of the packaging gives across a very happy and bright appeal. Also with the illustration of the cartoon bear and the use of yellow this can trigger childhood memories with the buyer.