Open source. Open possibilities.

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.

Chakra UI is an open-source React component system for building accessible web apps and SaaS products quickly. It ships installable component packages, supports Next.js RSC, and is MIT licensed.

MudBlazor is a Material Design component framework for Blazor, written entirely in C# with minimal JavaScript. It helps .NET developers build web apps quickly without wrestling with CSS, and offers documentation, examples and frequent releases.

Zag provides headless, framework-agnostic state machines for accessible JavaScript UI components, with adapters for React, Solid, Vue and Svelte and unstyled APIs for building your own design system.

ZenUI Library React is an open-source UI component library built with React and Tailwind CSS. It offers 800+ components, 20+ templates, 100+ animated components, 500+ icons and color tools, and is used by copying code snippets into your project.

Mirotone React is a component library for the Mirotone Design System, providing a set of React components and utilities to accelerate development for Miro.

@alifd/next is Alibaba Fusion's configurable React component library for enterprise backend (mid/back-office) systems. It pairs with Fusion Design theme packages so designers and developers share one visual source, and supports npm or browser installs plus per-module imports.

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.