Material UI Kit
This Material UI kit contains all the main graphic elements of a user interface, just as defined by the style guidelines of Google's material design. All the items are provided in two PSD files, grouped in layers, and arranged in groups of interface components like buttons, grids, menus, and more. with guides to define the spacing and alignment of the different components of your app design.
Plus three examples of responsive layouts, 100% editable and a 10-screen assets for 5, 7 and 9-inch mobile screens and desktop.