Sketch Repo - Collection of resources for anyone who uses Sketch
Prynt - Turn your smartphone into a Polaroid
Anima App - Design, get feedback, convert to code, publish, iterate.
Impossible I-1 Instant Camera - Take real polaroid photos with your iPhone
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
AiryCam - Look good in every photo