This list covers tools for building everything from simple buttons to complex data grids and animations. Choose based on your project’s needs (framework compatibility, performance, or customization).

Core Frameworks & Component Libraries

1. React reactjs.org A declarative library for building component-based UIs.
2. Vue.js vuejs.org Progressive framework for building reactive interfaces.
3. Angular angular.io Full-featured framework with two-way data binding.
4. Svelte svelte.dev Compiler-driven framework for lean, fast components.
5. Preact preactjs.com Lightweight React alternative (3KB).
6. SolidJS solidjs.com React-like syntax with fine-grained reactivity.
7. Lit lit.dev Fast, lightweight Web Component library.
8. Alpine.js alpinejs.dev Minimal framework for declarative DOM interactions.
9. Stencil stenciljs.com Compiler for generating Web Components.

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UI Component Libraries

1. Material-UI (MUI) mui.com React components following Google’s Material Design.
2. Ant Design ant.design Enterprise-level React UI library.
3. Chakra UI chakra-ui.com Accessible, modular React components.
4. Semantic UI semantic-ui.com Intuitive UI components with natural language syntax.
5. Headless UI headlessui.com Unstyled, accessible components for React/Vue.
6. Radix UI radix-ui.com Primitives for building accessible, customizable UIs.
7. Quasar quasar.dev Vue-based framework for cross-platform apps.
8. Vuetify vuetifyjs.com Material Design components for Vue.
9. PrimeReact primefaces.org/primereact Rich UI components for React.
10. React Suite rsuitejs.com React library for enterprise systems.

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Animation & Motion

1. Framer Motion framer.com/motion Production-ready animations for React.
2. GSAP (GreenSock) greensock.com/gsap High-performance animation toolkit.
3. React Spring react-spring.dev Spring-physics-based animations.
4. Anime.js animejs.com Lightweight JavaScript animation engine.
5. AOS (Animate On Scroll) michalsnik.github.io/aos Scroll-triggered animations.

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Data Visualization & Charts

1. D3.js d3js.org Powerful data-driven document manipulation.
2. Chart.js chartjs.org Simple, flexible charts with canvas.
3. Three.js threejs.org 3D graphics library for WebGL.
4. Victory formidable.com/open-source/victory React components for data viz.
5. Recharts recharts.org Declarative charting library for React.

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Drag & Drop

1. React DnD react-dnd.github.io Drag-and-drop utilities for React.
2. Draggable shopify.github.io/draggable Modular drag-and-drop library.
3. Sortable.js sortablejs.github.io/Sortable Reorderable lists with minimal code.

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Forms & Validation

1. Formik formik.org React form management with validation.
2. React Hook Form react-hook-form.com Performant forms using React hooks.
3. Yup github.com/jquense/yup Schema validation for JavaScript.
4. Zod zod.dev TypeScript-first schema validation.

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Tables & Grids

1. AG Grid ag-grid.com Feature-rich grid for React/Angular/Vue.
2. React Table tanstack.com/table Headless UI for building tables.
3. Grid.js gridjs.io Lightweight grid plugin.

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Date & Time Pickers

1. React DatePicker reactdatepicker.com Customizable date picker for React.
2. Luxon moment.github.io/luxon Modern date/time manipulation.
3. Day.js day.js.org Lightweight alternative to Moment.js.

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Modals & Notifications

1. SweetAlert2 sweetalert2.github.io Beautiful popup modals.
2. React Modal reactcommunity.org/react-modal Accessible modal component.
3. Toast UI ui.toast.com Notification and editor components.

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Carousels & Sliders

1. Swiper swiperjs.com Modern touch slider.
2. React Slick react-slick.neostack.com React port of the Slick carousel.

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Maps & Geolocation

1. Mapbox GL JS docs.mapbox.com/mapbox-gl-js Interactive, customizable maps.
2. Leaflet leafletjs.com Mobile-friendly mapping library.

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Scrolling & Parallax

1. FullPage.js alvarotrigo.com/fullPage Full-screen scrolling sections.
2. Locomotive Scroll locomotivemtl.github.io/locomotive-scroll Smooth scrolling with parallax.

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Utilities & Helpers

1. Lodash lodash.com JavaScript utility library.
2. RxJS rxjs.dev Reactive programming with observables.
3. Immer immerjs.github.io/immer Immutable state updates made easy.
4. Zustand github.com/pmndrs/zustand Minimal state management for React.

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Testing & Debugging

1. Storybook storybook.js.org UI component development environment.
2. Cypress cypress.io End-to-end testing for web apps.

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Miscellaneous

1. Tone.js tonejs.github.io Web audio framework for interactive sound.
2. P5.js p5js.org Creative coding and generative art.
3. Hammer.js hammerjs.github.io Gesture recognition for touch interactions.

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