Fluid for Sketch - Sketch plugin to make your responsive designs more efficient
Anima App - Design, get feedback, convert to code, publish, iterate.
Sketch Styler - Sets the most similar style to unstyled layers automatically
Git Sketch Plugin - Version control for designers
Dood : The Puzzle Planet - A strategy puzzle game for the smart ones
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.