Flowkit - Sketch library for user flows/content maps/annotations
Mapbox Mobile - Open source SDK for maps on mobile
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.
Trafi - The most connected transport app!
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.
FolioReaderKit - A Swift ePub reader and parser framework for iOS.