Velvet UI Kit - Cozy iOS UI Kit designed for Sketch 🌸
Sketch Mirror - Preview your iOS designs directly on your devices
Owlead - Grow your Twitter with valuable followers, effortless
Figma Mirror - Figma Mirror is an application that covers top trending designing or sketching ideas making your teamwork in a single environment and design better products from start to finish.
Angle 2 Mockups - A giant Sketch Library for creating app presentations
Flowkit - Sketch library for user flows/content maps/annotations