Duende is a very clean + beautiful design, simple to start, easy customize and fully featured frontend theme built on using Bootstrap 3.x. It's built from 20 + Building blocks, 30+ widgets and 40+ pages. The theme is fully responsive, working perfectly on all devices: Big screen, laptop, tablet and mobile, from 4 inch + .. The code is very clean and easy to understand and best to any developer to build the real web application.