Layer CSS - Lightweight CSS framework to build your own fluid layouts
Figma Super Tidy - Figma plugin to easily align, rename and reorder your frames
Paaatterns - Free collection of beautiful patterns for all vector formats
Easometric Figma Plugin - With Easometric it's really easy to create isometric layers.
Unused CSS - Easily find and remove unused CSS rules
Design Lint - A design linting plugin for Figma.