FlatPad PSD Bundle - Developer License
Check out FlatPad, a UI designer toolkit full of high-quality graphics to get your project up and running in no time. Built with the simple and flexible Twitter Bootstrap framework in mind, FlatPad comes in multiple colors and is extremely customizable. Alter any graphics you'd like to make them your own or just slot them in to your project seamlessly to get up and running immediately. Also check http://store.repixdesign.com/flat-user-interface-template/ for more details.
You'll get a 55.0MB .ZIP file.