This free perspective mockup file for Photoshop has 3 screenshots with different dimensions for mobile devices, tablets and desktop/laptop screens. This makes it perfect for showcasing responsive web designs. A nice feature of this mockup style is that it allows you to get much more of your design onto the tablet and mobile screens than if they were displayed on the actual physical devices.
This article was published 10 years ago, therefore the contents of this post may be out of date.