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A little curiosity. A world of open source.
THE FIRST COLLECTIONSaas UI is a design system and source component registry for SaaS products built on Chakra UI. It provides a Chakra preset, CLI-installed editable components, hooks, forms, auth and modal packages, plus docs, Storybook and examples.
A production-ready React component library for building AI DIAL interfaces, featuring base components, theming, accessibility, Storybook docs, and an MCP server for AI agents.
Nebular is a customizable Angular UI library based on the Eva Design System, offering 4 visual themes, 35+ Angular UI components, a theming engine with runtime theme switching and CSS custom properties mode, plus Eva Icons SVG support and configurable authentication strategies.
Floem is a native Rust UI library with fine-grained reactivity and an ergonomic declarative API. It targets Windows, macOS and Linux, supporting GPU and CPU rendering, Flexbox/Grid layout, theming, animations and an element inspector.
A React port of GitLab's Pajamas Design System component library, offering design tokens, foundational styles and basic components like GlButton, GlLink, GlBadge and GlCard. Still under heavy development.
FormatJS is a monorepo providing internationalization libraries for JavaScript, most notably react-intl. It offers ICU message parsing, locale-aware formatting, and build-time tooling.
Stisla is an open-source component library whose components share a constrained set of design tokens for color, spacing, radius, and typography. The README points to stisla.dev for documentation, live demos, and downloadable templates; the project is MIT licensed.
Franken UI (franken-ui/ui) is described as an HTML-first UI component library built on UIkit 3, extended with LitElement and inspired by shadcn/ui. Its README now only announces a move to 0build, so documentation lives elsewhere.
Storybook is a frontend workshop for building, documenting, and testing UI components and pages in isolation. It supports many frameworks and offers addons for accessibility, documentation, and interactive development.
Priceline Design System is Priceline.com's open-source UI component library and design standard. It aims to unify interface patterns, speed design and development, and promote accessibility, internationalization, and responsive web design. It ships as the npm package pcln-design-system with Storybook docs and an MIT license.
Build production-ready conversational AI apps in Python quickly. Supports tools like OpenAI, LangChain, and more. Community-maintained since May 2025.
MahApps.Metro is a UI toolkit for WPF that restyles standard controls with a modern Metro look, adds window chrome, theming, dialogs, and navigation controls without requiring control replacement.
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.
Recharts is an open-source chart library for React built on D3. It offers declarative, composable chart components rendered as native SVG with minimal dependencies, installable via npm, Deno or a UMD script tag, and documented with a storybook.
Material Design for Bootstrap is a free UI kit offering 700+ components, themes, and templates for building responsive, mobile-first websites. Available for jQuery, Angular, React, and Vue under MIT license.
Portainer is a lightweight service delivery platform providing a GUI and API to manage Docker, Swarm, Kubernetes, and ACI environments.
CompoMo (@ds-mo/ui) is a framework-agnostic Stencil.js web component library styled with TokoMo design tokens, shipping generated Angular, React and Vue adapters alongside an MCP metadata server.
Radix Themes is an open-source React component library focused on fast development, easy maintenance and accessibility, maintained by WorkOS. The README points to full documentation, release notes, contributor guidelines, community channels and its MIT license.
Kivy is an open-source Python framework for developing cross-platform GUI applications for desktop, mobile, and embedded platforms.
PlayCanvas PCUI is an MIT-licensed UI component library for web tools, offering fully styled components, React wrappers, observer-based data binding, Storybook examples, font theming, and UMD bundle support.
