Bootstrap is a bundle of tools which is used for creating websites and web applications at free of cast. It contains HTML5 and CSS3-based design layouts for font, forms, buttons, menu navigation and all other interface mechanism, as fine as elective JavaScript extensions.

Since version 2.0 it also supports responsive web designing. This means the layout of web pages adjusts animatedly, nice-looking into account the characteristics of the device used (Smartphone, desktop systems, tablet).

Starting with version 3.0, Bootstrap adopted a Smartphone first design beliefs, emphasizing responsive layouts by default.

Bootstrap is open source scripts and its available on GitHub. Web Developers are positive to contribute in the project and make their own contributions to the platform.