Merge Duplicate Symbols - Automatically find and act on duplicate symbols in Sketch
PSD to Sketch Design Converter - Convert a Photoshop design to a layered Sketch file for free
Frames for Sketch - Create awesome websites & apps using powerful design system
Sketch Repo - Collection of resources for anyone who uses Sketch
Auto-Layout for Sketch - Responsive design for Sketch
Zeplin - Collaboration app for UI designers & frontend developers