Design Systems Repo - A collection of design system examples and resources
Figma Super Tidy - Figma plugin to easily align, rename and reorder your frames
Design Principles - An open source repository of design principles and methods
Easometric Figma Plugin - With Easometric it's really easy to create isometric layers.
Eva Design System - A free customizable design system
Design Lint - A design linting plugin for Figma.