Open source. Open possibilities.

Materialize is a modern CSS framework based on Material Design principles, providing a set of tools to create responsive and visually consistent user interfaces.

Pixel Art to CSS is a React-based online editor for drawing and animating pixel art, then generating CSS using box-shadow and keyframes. It supports palette customization, animation settings, project save/load, and export to static image, animated GIF, or sprite image.

cube-ui is a mobile UI component library implemented in Vue, open-sourced by DiDi. It supports full or modular component registration, ships with documentation, an example app, and a vue-cli based template for scaffolding new projects.

NodeGUI is a library for building cross-platform native desktop applications with Node.js and CSS-like styling, powered by Qt6 for low CPU and memory usage. It offers complete Node.js API support, Flexbox layout, TypeScript support, and React/Vue/Svelte variants.

draw.io is a configurable JavaScript-based client-side editor for general diagramming and whiteboarding.

Official LottieFiles web player for Lottie (.json) and dotLottie (.lottie) animations, with a Rust + WASM core, Canvas2D/WebGL2/WebGPU backends, runtime theming, state machines, audio, worker rendering, and React, Vue, Svelte, Solid and Web Component SDKs.

A collection of bouncing DVD logo implementations across a wide variety of programming languages and platforms.

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.

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.

A free, browser-based database entity relationship diagram (ERD) editor and SQL generator.

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.

H5-Dooring is an open-source low-code editor for creating H5 landing pages and PC-oriented sites through drag-and-drop components, templates, forms, interactions, previews, and project/data management.

Anime.js is a fast, lightweight JavaScript animation library with a powerful API for animating CSS properties, SVG, DOM attributes, and JavaScript objects.

Vuestic UI is an MIT-licensed Vue 3 component library from Epicmax, offering accessible UI components, documentation, Nuxt and Tailwind integrations, and a CLI scaffold command for quick project setup.

A collection of front-end visual effect cases (Vue version) featuring over a hundred examples including CSS animations, Canvas, Three.js 3D, and AI applications, with a corresponding React version available.

Carbon is IBM's open-source design system for products and experiences. This monorepo provides React and web component libraries, Sass styles, design tokens, icons, pictograms, and tooling for building consistent interfaces.

mo · js is a fast, retina-ready, modular JavaScript motion graphics library for the web. It offers a declarative API with built-in components like Html, Shape, Swirl, Burst, and Stagger for creating delightful web animations.

A native Windows application designed to convert video clips into optimized, looping GIFs with a built-in editor for precise trimming and customization.

Vuetify is an MIT-licensed Vue UI component framework offering handcrafted, responsive components with theming, SASS customization, Vite tree-shaking and 42+ language support.

Flowbite is an open-source UI component library built on Tailwind CSS, offering interactive components like modals, dropdowns and datepickers driven by data attributes, with vanilla JS APIs, TypeScript types, RTL support and bindings for React, Vue, Svelte and Angular.