Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
iOS 12 GUI - Free collection of UI components and screens of iOS 12
Sketch - Professional digital design for Mac.
Fludish Sketch UI Kit - 🌱 Fluent iOS UI Kit designed for Sketch.
Invision - Prototyping and collaboration for design teams
Velvet UI Kit - Cozy iOS UI Kit designed for Sketch 🌸