Web and mobile applications are a quite new part of web design and because of the day by day development of internet technology, their importance increase significantly. Can you imagine living without a web mail client or without your smartphone and its apps? Is hard, isn`t it? Designing apps is all about user interface, or UI and every design starts in Photoshop.
If you have some ideas about interesting apps and want to build them, I`m here to help by presenting you no more or less than 20 pixel-perfect and free UI kits!