Sketch Repo - Collection of resources for anyone who uses Sketch
Sketch Mirror - Preview your iOS designs directly on your devices
Sketch 101 by Designlab - Learn Sketch in this free course w/ downloadable templates
Flowkit - Sketch library for user flows/content maps/annotations
RookieUp Career Bootcamps - Tools to help designers build great portfolios and get jobs.
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.