Twitter Bootstrap is a powerful and easy to use framework enabling front-end developers to craft professional and high quality Bootstrap templates with flexible responsive layouts that look great on tablets, mobiles and desktops. Since its release back in august 2011 the development community has been growing fast, providing developers with the tools and knowledge to create ready-to-use, native Bootstrap html/CSS templates or themes that work on popular publishing platforms like WordPress and Joomla. One of the main reasons why Bootstrap is so popular is the ability to develop web apps and websites fast and its support for responsive design. When compared to other responsive CSS frameworks available it is also one the most mature frameworks with the largest user base at the moment, which certainly will have a positive effect on how mobile friendly websites are build.