The full stack design system - Inside Intercom

Priority Guides: A Content-First Alternative to Wireframes · An A List Apart Article

Grabient

Chart.xkcd | xkcd styled chart lib

Snowpack

✨Calculating Color: Dynamic Color Theming with Pure CSS | Una Kravets Online✨

The Web Is Agreement – Jeremy Keith – Medium

Sketch - Introducing Smart Layout

Design v17 | CSS-Tricks

Why Your App Looks Better in Sketch – Nathan Gitter – Medium

When And How To Use CSS Multi-Column Layout — Smashing Magazine

Flowkit – Userflows right inside your favorite design tool. Available for Figma, Sketch, and Adobe XD.