Mobile Design Kit is free to use templates for mobile. They are designed in real pixels screen sizes for 15 flat designed devices which includes iPhone 4s & 5, iPad 2, 4 & Mini, Galaxy Pocket, Young, S3 Mini, S3, S4 & Nexus 7, Lumia 520 & 920, Surface RT & Pro. There are multiple colors you can choose from. And also, they are outlined and designed with grids.
License: License Free