Mock Magic is a free, easy-to-use device mockup generator that is capable of generating high-resolution device mockups instantly. Your designs are never uploaded and always stay only on your device.
MockMagic's answer:
Mock Magic is very easy to use. It generates instant mockups, no waiting time
Apple Watch UI Kit - Quickly create Apple Watch app prototypes
Mockup Generator - Create attractive product screenshots with just a few clicks
Module 02: Layouts - Professional toolkit for UI/UX design
Mockly - Stunning ebook mockups in minutes
Dimmy.Club - Device mockup generator for your website and app screenshots
Mockup Generator by Pixeltrue - Create beautiful product mockups in just a few clicks