Flat UI Free – Framework and Bootstrap Theme Design FreebiesAndrian Valeanu • March 08, 2013 • 2 minutes READ Flat UI Free is made on the basis of Twitter Bootstrap 3 in a stunning flat-style. Flat UI Free contains many basic and complex components which are great for designers to have at hand: buttons, inputs, button groups, selects, checkboxes and radio-buttons, tags, menus, progress bars, slide