Bootstrap is the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first web sites.It contains HTML and CSS-based design templates for typography, forms, buttons, navigation and other interface components, as well as optional JavaScript extensions. Bootstrap has been making some serious waves of popularity ever since it burst upon the scene in August 2011. The powerful front end mobile first framework, though just a little above 3 years, is now empowering more than 3.5mn websites. EscortZone
Source: http://www.template.net/web-templates/bootstrap/bootstrap-template/
See also:
- Bootstrap Vs. Foundation – Detailed Comparation [Infographic]
- Why Responsive Websites are Important [Infographic]
- The Difference Between Adaptive and Responsive Web Design [Infographic]