Elements for Sketch - High-quality UI Kits in Sketch, for free
iOS 12 GUI - Free collection of UI components and screens of iOS 12
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Fludish Sketch UI Kit - 🌱 Fluent iOS UI Kit designed for Sketch.
DynaMaker - Cloud service for Visual Product Configuration with parametric geometry and CAD / BIM
Velvet UI Kit - Cozy iOS UI Kit designed for Sketch 🌸