MockMagic - A free, easy-to-use device mockup generator
Dashboard UI Kit - A modern & responsive dashboard UI kit for designers.
Dimmy.Club - Device mockup generator for your website and app screenshots
Bots UI Kit - Fully customizable Sketch UI Kit for Messenger Platform
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Landing UI Kit - Handcrafted UI components for landing pages