Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Platforma - Wireframe library of layouts and UI elements
UX Wireframe Kits - Simple, beautiful wireframe kits for Sketch & Illustrator
Craftwork - A collection of User Interface resources made by Craftwork
UI Flow Cards - Construct web pages with ease, using cards
Method Wireframe Kit - Find your method of being incredibly fast in prototyping.