Design System GitHub Repositories (2026) · Open Source Tools

Agent skills that give coding agents taste: art direction, reference images and a browser check instead of generic AI pages

A design system for AI applications. Material, physical, tactile, technical.

An agent-first linter for Tailwind design systems. Write design system rules that agents can verify.

🌼 🌼 🌼 🌼 🌼  The most popular, free and open-source Tailwind CSS component library

Unstyled UI components for building accessible web apps and design systems. From the creators of Radix, Floating UI, and Material UI.

Arc Library: free, open source React components with calm motion. Copy the code or install with the shadcn CLI.

Unstyled, accessible UI components for your design System. Works in React, Vue, Solid, and Svelte.

A design system built by IBM

🍭 Lobe UI - an open-source UI component library for building AIGC web apps

Give your AI coding agent a design system. One command installs 500+ quality-graded company DESIGN.md references + skills into Claude Code, Codex, Cursor, and OpenCode. Free, MIT, zero AI calls.

SEED Design System

Open-source design-method engine for Claude Code, Codex & Cursor. 23 agent skills for fixed design judgment, multiple grammars, semantic palettes, reference compilation, and evidence-verified UI. MIT.

AI-powered Storybook story generator — works with any framework, any design system, any LLM provider

A Jetpack Compose UI framework bringing a faithful 1:1 recreation of iOS 27 Liquid Glass, animations, controls, and interactions to Android.

Monorepo of HAX web components built with Lit and the DDD design system, published to npm as @haxtheweb/*

Layer5, expect more from your infrastructure

a react-based framework that provides accessibility, modularity, responsiveness, and theming in a tidy package

Material UI: Comprehensive React component library that implements Google's Material Design. Free forever.

A renderless component library for Compose Multiplatform that handles accessibility, state, and UX logic without enforcing any visual styling.

Blazor UI components you own: headless primitives + styled components delivered as source by a dotnet tool. Tailwind CSS v4, 8 skins, 16 palettes, RTL and WCAG AA out of the box.