Open source. Open possibilities.

A Svelte 5 UI component library inspired by Vercel's Geist, aimed at helping developers build cohesive and consistent web experiences. It ships with an online documentation site and is released under the MIT license.

Tailgrids is an open-source React UI component library built with Tailwind CSS, offering 100+ production-ready copy-paste components plus UI blocks and templates, with TypeScript support, accessibility, dark mode and a CLI installer.

TW Elements is an MIT-licensed component library for Tailwind CSS, offering 500+ interactive UI components and 117+ design blocks with dark mode support, theming options, and quick installation for personal and commercial use.

Twin.macro is a Babel macro that brings Tailwind CSS utility classes to CSS-in-JS workflows, converting tw, css, styled, and theme usages into CSS objects at build time. It supports emotion, styled-components, solid-styled-components, stitches, and goober, with setup examples for Vite, Next.js, Gatsby, Storybook, and more.

A comprehensive production-ready boilerplate for Next.js 16+, Tailwind CSS 4, and TypeScript, prioritizing developer experience with a full suite of testing, linting, and monitoring tools.

Welcome UI is the customizable design system open-sourced by Welcome to the Jungle (@wttj). Built with React, TypeScript, Tailwind CSS and Ariakit, it collects the core components needed to build a delightful web application, with detailed documentation in the library README.

daisyUI is a free and open-source component library for Tailwind CSS. It offers pre-designed, customizable UI components that can be used directly in HTML. The project is popular and includes extensive documentation, a component gallery, and community support.

Filament is an open-source UI framework for Laravel that provides ready-made building blocks — tables, forms, infolists, notifications, dashboard widgets and action modals — for building applications and admin panels quickly with Livewire.

Dembrandt is a Node.js CLI that renders a site with Playwright, reads computed DOM styles, and turns colors, typography, spacing, borders, shadows, motion and components into W3C design tokens, with CI drift gates and MCP support.