Sketch Mirror - Preview your iOS designs directly on your devices
iOS Design Kit - The newest library of native iOS templates
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.
iOS 12 GUI - Free collection of UI components and screens of iOS 12
Crystal: Sketch Mirror for Android - Crystal: Sketch Mirror for Android is an application that is designed for viewing your sketch designs in real-time, navigate prototypes and download content related to the sketches for offline viewing.
Ionic Sketch UI Kit - Smart Sketch library for Ionic 3