Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
MockMagic - A free, easy-to-use device mockup generator
Platforma - Wireframe library of layouts and UI elements
Platforma for iOS - The ultimate wireframe kit for app prototyping
Wireframe for Figma - Lightning fast wireframing on figma (500+ elements)
Smart Watch UI Kit - Helps smartwatch designers to design easily, 52 design