HTML5 Up - Free Responsive HTML5 & CSS3 Site Templates
If you ever need a HTML5 CSS3 Site template, you should definitely check out HTML5up! They offer amazing free HTML5 CSS3 site temples for many different kinds of websites. Not only are the templates amazing, but they are also responsive. The templates are responsive to desktop, tablet, and mobile devices!
Here's a brief selection of what they have to offer:
The templates are licensed under the Creative Commons Attribution license.