Select Similar Layers - Sketch plugin to select layers with the same attributes
Git Sketch Plugin - Version control for designers
Framer Inventory 3 for Sketch - Import states & export prototypes from Sketch to Framer
Fluid for Sketch - Sketch plugin to make your responsive designs more efficient
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Sketch Plugin Course by Design+Code - Enhance your design workflow by creating a Sketch plugin