Anima App - Design, get feedback, convert to code, publish, iterate.
Frames for Sketch - Create awesome websites & apps using powerful design system
Sketch Repo - Collection of resources for anyone who uses Sketch
Sketch Confetti - Generate gorgeous confetti patterns in 1 click.
Git Sketch Plugin - Version control for designers
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.