Pixel City – Procedurally generated city (2009) [video]
Shamus Young's stuff is pretty incredible. Not the programs themselves, because it's "been done before." Rather, it's his writing skill that really shines. He has a true talent for describing and illustrating difficult or complex programming, and then showing it in action in a nicely-wrapped binary executable. You can see all of his wonderful series here: http://www.shamusyoung.com/twentysidedtale/?page_id=16458