Bootstrap
Bootstrap is the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first web sites.
Bootstrap is completely free to download and use!
Resources: 01 - Learn Bootstrap - http://www.w3schools.com/bootstrap/default.asp 02 - Bootstrap RTL - https://github.com/morteza/bootstrap-rtl
CDN: <!-- Latest compiled and minified CSS --> <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css"> <!-- jQuery library --> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <!-- Latest compiled JavaScript --> <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> CDN RTL: <link rel="stylesheet" href="//cdn.rawgit.com/morteza/bootstrap-rtl/master/dist/cdnjs/3.3.1/css/bootstrap-rtl.min.css">