Carbon is IBM's open-source design system, built on the IBM Design Language with 30+ components, React and Angular libraries, Sketch and Figma kits, and a large, active contributor community.
Every component page pairs usage guidelines with accessibility notes and live, editable code examples together, so a designer and a developer can reference the exact same source rather than working from separately maintained docs.
Developers and designers who want a genuinely production-ready, actively maintained open-source system to install, not merely a visual reference to study.
The monorepo ships design tokens, icons, and pictograms alongside the component code, worth checking directly on GitHub if planning to adopt rather than just browse.
IBM's own design system.