Git Sketch Plugin - Version control for designers
SketchTool - Export pages & slices out of .sketch docs using CLI
Fluid for Sketch - Sketch plugin to make your responsive designs more efficient
Select Similar Layers - Sketch plugin to select layers with the same attributes
Unsplasher - Fill shapes or symbols in Sketch with images from Unsplash 🖼
Base UI Sketch Framework - Huge set of everything you need to design and prototype