UX Flow Wireframe Prototyping System - Create beautiful user flows prototypes for your next project
Figma Super Tidy - Figma plugin to easily align, rename and reorder your frames
draw.io - Online diagramming application
Easometric Figma Plugin - With Easometric it's really easy to create isometric layers.
UMLGraph - UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
Design Lint - A design linting plugin for Figma.