Auto-Layout for Sketch - Responsive design for Sketch
SketchCasts - A weekly screencast, all about how to use Sketch
Sketch Repo - Collection of resources for anyone who uses Sketch
GoRails - Ruby on Rails screencasts for Web Developers
PSD to Sketch Design Converter - Convert a Photoshop design to a layered Sketch file for free
Sketch Talk - A community for Sketch users of all skill levels