Git Sketch Plugin - Version control for designers
Sketch Tricks - Articles for Sketch
Anima App - Design, get feedback, convert to code, publish, iterate.
The Good Workshop - TGW helps experts plan, run, and track UX, CX, Product and innovation workshops, fully automated and straightforward user experience.
Marvel for Sketch - Sync, play and record prototypes in Sketch!
Auto-Layout for Sketch - Responsive design for Sketch