Open-source alternatives to Pattern Library

A set of high-quality standards based web components for enterprise web applications. Part of Vaadin 20+

This project is a web component framework and optimized web markup standard designed for high performance web development. It provides a system for building fast-loading websites using a specialized set of HTML components and scripts, complemented by a web performance validation suite to ensure markup compliance. The framework includes a dynamic HTML template engine for rendering data-driven content without full page reloads and a dedicated ad network integration framework. This integration system manages third-party advertisements with built-in viewability metrics and optimized loading seque

With the Vega component, you can display Vega-Altair charts in your Plotly Dash application. All features work as well with Vega-Lite and Vega specifications but the remainder of this README will focus on Altair as it is more common.

Spectrum Web Components

Ariakit is a headless component library and accessible UI component toolkit. It provides a set of unstyled web components with built-in accessibility patterns to ensure that screen readers and keyboard navigation function correctly. The project includes an adaptive color engine that calculates high-contrast text and dynamic surface colors for light and dark modes. It also features a concentric layout engine for computing nested padding, margins, and border radii for circular interface elements, alongside a design token system for managing global CSS variables. The toolkit covers broad capabi

Atomico a micro-library for creating webcomponents using only functions, hooks and virtual-dom.

For the end-user documentation, click here. This project made with LitElement and based on a modified version of the LitElement TypeScript starter.

Custom Element Wrapper for Stripe.js v3 Elements

Atoms for Blaze UI

🚀🌛 Use the Launch Platform 👩‍🚀👨‍🚀

MUICSS-yew is a component library for Yew framework based on the lightweight MUI CSS framework.

This project is a community-maintained open source directory that serves as a comprehensive index of React components and libraries. It functions as a technical knowledge base, mapping common development challenges to vetted third-party solutions to help developers accelerate their frontend workflows and avoid reinventing standard interface elements. The directory distinguishes itself through a decentralized, hyperlink-centric architecture that avoids hosting code locally, instead pointing users directly to external repositories. This content is curated through a collaborative model where com

Carbon Design System variant on top of Web Components

Chakra UI is a design system component library and styling framework that provides a foundation for building consistent, accessible web interfaces. It functions as a centralized theme configuration engine, using a design-token-driven architecture to manage visual properties like color palettes and spacing rules as a single source of truth across an entire application. The framework distinguishes itself through a type-safe styling utility that automatically generates TypeScript definitions from theme configurations, ensuring accurate property referencing and editor autocompletion. It employs a

🧬 Progressive Web Components.

Collection of Web Components by Clever Cloud

React hooks implementation of Google's Thanos easter egg

Yew components, based on PatternFly:

Components for interactive scientific writing, reactive documents and explorable explanations.

Swagger UI for MCP servers — explore, test, and visualize any Model Context Protocol server with rich components (charts, tables, pipelines). No LLM required.

⚡️ Useful pipes for Angular with no external dependencies!

🌟 DataFormsJS 🌟 A minimal JavaScript Framework, standalone React and Web Components, and JSX Compiler for rapid development of high quality websites and single page applications.

React-bits is a comprehensive toolkit for web development that combines a library of interactive motion primitives with a command-line interface for component management and AI-assisted coding. It provides a framework for implementing declarative motion states and specialized typography animations, allowing developers to build responsive, gesture-enabled interfaces that respond to user input. The project distinguishes itself through a remote registry system that allows for the direct injection of modular UI source code into local project directories. It also features a protocol-based bridge t

Ant Design is an enterprise-grade component library and design system framework built for developing complex, data-heavy web applications. It provides a comprehensive collection of pre-built, state-driven interface elements that map data properties to rendered components, ensuring consistent interaction patterns and visual language across large-scale projects. The library distinguishes itself through a robust styling architecture that utilizes design tokens and hierarchical configuration providers to propagate global settings like themes, locale, and layout direction. By employing component-l