Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Bootflat - BOOTFLAT is an open source Flat UI KIT based on Bootstrap CSS framework. And, for the designers, we offer a free PSD Download. It provides a faster, easier and less repetitive way for web developers or designers to create elegant web apps.
ThumbZilla - Awesome thumb stomping and kicking action game.
UIKit - A lightweight and modular front-end framework for developing fast and powerful web interfaces
Warlight - Warzone is a customizable Risk-like strategy game where you compete with your friends to conquer the world.