Sketch Mirror - Preview your iOS designs directly on your devices
TopTrendBooks - We rank over 15,000 books everyday based on Reddit 📚
Flowkit - Sketch library for user flows/content maps/annotations
Learn Forward - An open source tool for context-aware digital textbooks
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.
Tellast - Write stories collaboratively with others