Flat UI Free is user interface kit made on the basis of Twitter Bootstrap 3 in a colored flat-style. Kit is perfect if you want to develop very clean and stylish interfaces. Flat UI Free contains many basic and complex components: buttons, check-boxes and inputs, selects, menus and navigation elements, progress bars and sliders, and more.
Flat UI kit contains Photoshop PSD files to use, as well as some HTML. icons can easily be modified and used in a wide variety of projects, as they contain original layers. Glyphs are also available in PSD, HTML/CSS and SVG formats.