Design System 3 by Sigma is a paid, professionally built Figma UI kit and design system, shaped by years of product design practice, with over 300 icons, token systems, and a user journey template inspired by Airbnb's approach.
It supports light, dark, and a distinctive "liquid glass" theme mode built on Figma Variables, and every component category is color-coded for faster navigation inside large Figma files, a genuinely practical detail for teams working in a sprawling design file day to day.
Designers and small teams wanting a polished, purchasable starting-point UI kit rather than building a design system from a blank Figma file.
Unlike most entries in this category, it's a commercial product (purchased via Lemon Squeezy), not a free reference system from an operating company, worth budgeting for before adopting.
A Figma-first UI kit with clear docs, built for teams that want things to feel thought-through from the start.
