shotsnapp - Create beautiful device mockup presentation
Sketch Extensions - An official collection of Sketch extensions & plugins
Base UI Sketch Framework - Huge set of everything you need to design and prototype
Device Shots - Generate high-resolution device mockups using a screenshot.
SketchTool - Export pages & slices out of .sketch docs using CLI
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.