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.
Egg package made from recycled paper｜MOTTAINAI たまご
Pasta Packaging Concept - This caught my eye, because of how unusual it is. I found it odd the they made so the pasta creates the hair of the women on the boxes. It's creative and a neat idea, but i'm not sure it would actually work.
Loftから、47都道府県をかたどったカラフルでカワイイオリジナルボックス「県民BOX」発売｜ローカルニュース！（最新コネタ新聞）東京都 千代田区｜「colocal コロカル」ローカルを学ぶ・暮らす・旅するcurated by Packaging Diva PD. I think these are tourist gifts from certain cities.
Latona Marketing designed this "Piano Package" containing baked goods from Japan's Perle cakes.