G5 is a framework for building PHP-powered HTML5 websites which makes use of such popular resources (like Modernizr, jQuery, CSS3 Pie, etc.). G5 Framework started as a personal project. In an attempt to speed up workflow, reuse the best coding practices & similar coding techniques, the framework serves as a starter file for new websites.

Being an active member of the web design community, this framework is a result of a ton of reading and research. For over a year the framework was constantly changed, simplified, and updated with current best practices. The framework is very lightweight and only includes what I believe are the essentials.
It has many features like:
- robots.txt / robots meta for the search engines
- GZip for faster page load
- preventing CSS caching
- sticky footer
- always forcing latest IE rendering engine (even in intranet) & Chrome Frame
- smooth scroll-to-top
- shorthand CSS / some basic reusable classes
- and more..
The design has a 940px total content width and in “F” shape by default but can be updated in anyway desired.
Also, G5 includes widely-used items like an image slider (Orbit), tool tips (Tipsy) and modal boxes (Reveal).
Download G5 HTML5 Framework
Requirements: PHP
Compatibility: All Major Browsers
Website: http://framework.gregbabula.info/