Styleguide is a single html file to test all HTML and HTML5 elements. Useful for styling custom CSS frameworks, testing reset systems or just for funz.
Edit index.html as you need it, normally you would need to edit color names and font names, but hack the file as you need it. Edit css/styles.css to match the styles of your site. Enjoy a yummy Styleguide!
In short, you can use, copy, modify or distribute styleguide ("the software") in free or commercial work without charging any kind of fee.
Now, if you need a full license description, styleguide is licensed under Apache License version 2.0, found at: http://www.apache.org/licenses/LICENSE-2.0