Craft by InVision - Sketch and PS plugins to pull live data into your designs
Git Sketch Plugin - Version control for designers
Lucidspark - The virtual whiteboard that connects teams so they can bring their best ideas to life
Anima App - Design, get feedback, convert to code, publish, iterate.
SuperNormal - Async video updates for remote teams
Marvel for Sketch - Sync, play and record prototypes in Sketch!