Fenetre App - Picture in picture for your mac.
Anima App - Design, get feedback, convert to code, publish, iterate.
Polarr Photo Editor 3 - The most powerful photo editor in the web.
Sketch Repo - Collection of resources for anyone who uses Sketch
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Auto-Layout for Sketch - Responsive design for Sketch