Top DESIGN-SYSTEM GitHub Repositories & Tools (2026)

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

🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes, landing pages, dashboards, slides, images & video — real files, HTML/PDF/PPTX/MP4 export. 🤖 Claude Code / Codex / Cursor / DeepSeek Harness / OpenCode & 20+ CLIs via BYOK.

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

An enterprise-class UI design language and React UI library

Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

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

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

Microsoft Fluent UI Blazor components library. For use with ASP.NET Core Blazor applications

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

React Native UI library built on the Eva Design System: 30+ themeable, accessible components for iOS, Android and web. TypeScript, React 19 / RN 0.81, Eva and Material themes with runtime light/dark switching, on-demand style compilation.

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

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

SEED Design System

A set of React components for the PatternFly project.

OpenELIS Global — open-source Laboratory Information System (LIS/LIMS) for clinical and public-health labs in 25+ countries. Java/Spring + React (Carbon), FHIR R4 native, Docker.

An accessible & scalable color tokens system using LCH & OKLCH color system for Swift. Supports iOS, iPadOS, WatchOS, tvOS & visionOS.

Design data, including design tokens, component schemas, and tooling for Spectrum, Adobe's design system.

💎 An accessible, theme-ready design system built for learning applications and Open edX.

Carbon Design System SVG pictograms as Svelte components

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.