Sketch Measure - Spec tool for developers and teammates
Anima App - Design, get feedback, convert to code, publish, iterate.
Zeplin - Collaboration app for UI designers & frontend developers
Sketch Repo - Collection of resources for anyone who uses Sketch
Marketch - Marketch is a Sketch 3 plug-in for automatically generating html page that can measure and get CSS...
Auto-Layout for Sketch - Responsive design for Sketch