iOS Design Kit - The newest library of native iOS templates
Sketch Mirror - Preview your iOS designs directly on your devices
Sketch Repo - Collection of resources for anyone who uses Sketch
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.
SketchApp.rocks - Index of all awesome things related to Sketch.
Flowkit - Sketch library for user flows/content maps/annotations