Component Library GitHub Repositories (2026) · Open Source Tools

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

FluentQt (Fluent-Qt): Fluent / WinUI-style Qt Widgets UI components and Gallery for native C++ desktop apps, with optional PySide6 bindings and WebAssembly.

Warm, expressive React components with considered motion. MIT licensed shadcn registry and Fumadocs documentation.

🚀 Beautiful, fast and modern React UI library. (Previously NextUI)

AI-native SwiftUI component library with full-stack recipes — connect via MCP for instant access.

Beautifully designed terminal UI components for Ratatui apps

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

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

Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 155+ native components including DataGrid, Scheduler, Charts, and advanced theming with full support for Material Design and Fluent UI. If Radzen Blazor is useful to you, a ⭐ on GitHub helps other Blazor developers find it.

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.

Turn Claude into a senior design architect: DTCG tokens, 52 components, WCAG 2.2 AA-AAA, 138 design systems, any-framework code, and 50 objective gates that fail the build instead of faking success.

Svelte implementation of the Carbon Design System

A library of behaviors for agents to build the next generation of user interfaces.

USWDS 3.0 components built in React

Useful third party extension components for MudBlazor, from the contributors.

React components for email templates, web pages, documents, and images. Generate email-safe HTML, responsive web pages, print-ready PDFs, and PNG/SVG images from one component tree.

Carbon by Sage | ReactJS UI Component Library

⚡️ A collection of ready-to-use Lightning Web Components that might help your SFDX project

Object-oriented views in Ruby.

ECL - Europa Component Library