Sketch Repo - Collection of resources for anyone who uses Sketch
Base UI Sketch Framework - Huge set of everything you need to design and prototype
Auto-Layout for Sketch - Responsive design for Sketch
SketchCasts - A weekly screencast, all about how to use Sketch
Supernova Studio - The world’s first true design-to-code platform 🚀
UiSketcher - Easily sketch user interface with your pen-enabled device!