Using Bootstrap to spruce up your pages
This open-source front-end framework is believed to control about one-eighth of all web sites. Its main attraction is its responsive system, styling pages appropriately no matter what size your viewer, whether a cellphone, tablet or full-size computer. It also offers out-of-the box styling for tables, forms, buttons, images, navigation, icons and typographic elements. It's free and does not require any sign-on or user information to download from getbootstrap.
You can find examples of the most inventive uses of Bootstrap here at the Expo section of the getbootstrap site.
The bootswatch.com site has several templates for free to change even the basic look of your site with one download. All it does is change the stylesheet for bootstrap.