Source Wireframe Kit - Library of 537 blocks for desktop and mobile prototyping
Platforma - Wireframe library of layouts and UI elements
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Method Wireframe Kit - Find your method of being incredibly fast in prototyping.
Form Wireframe Kit by InVision - A free wireframe kit from InVision
Root UI Kit - Wireframe & design starter kit 🛠️