Onsen : Open source HTML5 hybrid app framework for PhoneGap & Cordova
Mobile-optimized HTML5, CSS and JavaScript with Web components
Responsive layout, Materi...
AppJS : Build Desktop Applications for Linux, Mac and Windows using HTML, CSS and Javascript
Undum : A client side framework for hypertext interactive fiction games
chromeless : The chromeless project is an experiment into making it possible to build a web browser using only web technologies, like HTML, JavaScript, and CSS.