Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
Figkit - Figkit is a wireframe library for Figma to communicate and design great user interfaces for desktop and mobile.
Invision - Prototyping and collaboration for design teams
Lo-fi Wireframe Kit for Figma - Free component library that helps you explore ideas, faster
Easometric Figma Plugin - With Easometric it's really easy to create isometric layers.
Sections Wireframe Kit - Biggest library of layouts for web prototyping