GOG.com is built with tones of our own super-uber complex algorithms, x-dimensional-databases and other stuff so wicked, that sometimes even we aren’t really sure how it works... But it's not only that. We're also using some of our favourite third-party icons, frameworks, libraries and technology and we would like to send kudos to people who created them:
Yusuke Kamiyamane for Diagona and Fugue Icon packs - www.pinvoke.com