Looseleaf

ReUI is a free, open-source React component library for the shadcn/ui ecosystem, developed by Keenthemes. It provides more than 1,000 copy-and-own registry examples across 71 categories, presented in realistic dashboard layouts rather than isolated demos, including data grids, filters, timelines, steppers, trees, calendars, kanban boards, and other interface blocks. The components are composed from shadcn/ui primitives and Tailwind CSS, with 19 custom in-house component types. Its Data Grid uses TanStack Table and virtualization and supports features such as drag-and-drop, pinning, resizing, and infinite scrolling. The in-house components have both Radix UI and Base UI versions and are distributed as TypeScript source through the registry rather than as an npm package, allowing the source to be copied into a React project. ReUI is released under the MIT License.

Moumen Lab is a React component registry for interface components such as menus, OTP inputs, upload staging, command palettes, and draggable reorderable lists. Components are distributed in the shadcn registry format and installed as source code with the `moumenlab` CLI or shadcn CLI, so no runtime package is required. The components use Tailwind CSS with shared `lab-theme` tokens and motion-based animations that are interruptible, layout-aware, and reduced-motion aware. The repository includes live showcases, component blueprints, source files, registry metadata, and a monorepo-based CLI; it targets React 19, Tailwind CSS v4, Node.js 18+ for installation, and is licensed under MIT.

shadcn/ui is an open-source collection of accessible UI components and a code distribution platform for building custom component libraries. It distributes component source code directly into consuming projects, where developers can customize, extend, and build on the components across supported web frameworks. Documentation is available at ui.shadcn.com/docs, and the project is licensed under the MIT license.

pdfcn is a free, open-source library of customizable PDF components for React, designed in the style of shadcn/ui. It uses a registry format and CLI workflow for copying components into an application, where they can be customized and composed into tables, forms, charts, invoices, reports, and other documents. PDFs can be rendered through either Takumi or Forme. The project provides zero-configuration defaults, live previews in its documentation, shared themes and props, and composable React components with renderer primitives. It is licensed under the MIT License.

Drawesome is a drawing toolbar and canvas component for React applications. It provides seven pen types—pencil, pen, brush, fineliner, highlighter, fountain pen, and another configurable pen tool—that vary stroke width according to movement speed or direction, plus an eraser that removes areas of strokes rather than deleting whole strokes. The React component supports configurable tools, colors, sizes, opacity, toolbar placement, appearance, controls, themes, tooltips, keyboard shortcuts, and initial or externally managed strokes. Drawings can be exported as SVG or PNG, downloaded directly, or accessed as stroke data through its ref methods. It is installed with npm, requires React 18 or later as a peer dependency, and has no runtime dependency beyond React.