Bootstrap is a front-end framework from Twitter designed to kick-start development of webapps and sites.

Bootstrap is a front-end framework from Twitter designed to kickstart the front-end development of webapps and sites. Among other things, it includes base CSS and HTML for typography, icons, forms, buttons, tables, layout grids, navigation along with custom-built jQuery plug-ins and support for responsive layouts.

It is tested and supported in the major modern browsers, such as the latest versions of Safari, Google Chrome, Firefox 5+, and Internet Explorer 7+. Mobile browsers are supported by Bootstrap versions 2.0 and later.

Starting with version 2.0, the default download package contains cumulative JavaScript and CSS files. If you're looking for the uncompiled LESS source files, documentation and example templates, you can download them from the project's GitHub page.

There are two major version of the framework:

It was licensed under the Apache 2 License, but is now dual-licensed under both the MIT License and Apache 2 License, after this issue was closed.

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