Root UI Kit - Wireframe & design starter kit 🛠️
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Figkit - Figkit is a wireframe library for Figma to communicate and design great user interfaces for desktop and mobile.
Auto-Layout for Sketch - Responsive design for Sketch
Sections Wireframe Kit - Biggest library of layouts for web prototyping
Figma Auto Layout - Design more, resize less