Flowkit - Sketch library for user flows/content maps/annotations

Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.

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.

User Onboarding - Onboarding teardowns of popular sites/services

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.

Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.