2 Great HTML & CSS UI Kits
Free Web User Interface Kit
Flat UI Free is an awesome HTML UI kit containing a lot of useful web elements for your web projects. It has been made on the basis of Twitter Bootstrap in a stunning flat-style, and the kit also includes a free PSD version for designers.
Light UI Kit in CSS & HTML
2 Great HTML & CSS UI Kits. It’s also fully coded for you in CSS and HTML, so it’s ready to drop into your own website! Absolutely free.