Web Developers who work smart are often building on top of pre-existing frameworks. Open source CSS libraries are not hard to find – including many of the newer CSS3 effects. When structuring an HTML page you’ll rely on CSS as the language of color, position, structure, and other components of the final layout.
This gallery includes 28 free open source frameworks you can try out when designing new projects. You’ll find a number of CSS grid systems along with extra goodies like CSS UI kits or transition libraries. It’s never been easier to learn how to build websites from scratch. Open source code is changing the way we structure projects and how much development time is required.
Responsive Grid System
960 Grid System
Metro UI CSS