Best Free Component Libraries

DHTMLX

DHTMLX is a JavaScript UI library that provides a set of highly customizable and flexible components for building modern and responsive web applications. The library includes more than 30 UI components, such as Gantt, Scheduler, Kanban, diagrams, charts, grids, spreadsheets, calendars, trees, forms, and more. DHTMLX helps to advance web development and build feature-rich data-intensive applications of any complexity. One of the key advantages of DHTMLX is its compatibility with different web frameworks, including React, Angular, and Vue.js, which makes it a great choice for developers who are already working with these frameworks. DHTMLX is also designed with performance in mind. Its components are optimized for fast rendering. A comprehensive and rich API provides a straightforward way to manipulate JavaScript/HTML5 UI widgets. The library has detailed API documentation, tutorials, and examples that help developers quickly get up to speed and start building their apps.

Starting Price: $79

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Flutter

Google

Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase. Paint your app to life in milliseconds with Stateful Hot Reload. Use a rich set of fully-customizable widgets to build native interfaces in minutes. Quickly ship features with a focus on native end-user experiences. Layered architecture allows for full customization, which results in incredibly fast rendering and expressive and flexible designs. Flutter’s widgets incorporate all critical platform differences such as scrolling, navigation, icons and fonts, and your Flutter code is compiled to native ARM machine code using Dart's native compilers. Flutter's hot reload helps you quickly and easily experiment, build UIs, add features, and fix bugs faster. Experience sub-second reload times without losing state on emulators, simulators, and hardware.

9 Ratings

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Ionic

Drifty

The Ionic Platform allows you to bring your apps to market faster with an integrated app platform built on the leading cross-platform mobile SDK. Build, secure, and deliver new mobile apps—and transform existing ones—across iOS, Android, and Web platforms from a single codebase. Full scalability—Grow from prototype to production to enterprise-scale, without having to think about capacity, reliability, or performance. Better apps, everywhere—Slash your development time and costs with a platform that lets you write once and deploy anywhere—iOS, Android, and Web. The core of the Ionic development experience is Ionic Capacitor, a cross platform native runtime that runs equally well on native iOS and Android mobile devices, as well as any web browser. The big difference is that, unlike traditional native development or cross-platform approaches, the UI of a Capacitor app runs primarily in the browser.

6 Ratings

Starting Price: Free

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ILLA Cloud

Accelerate your internal tools development. A low-code platform for developers to build internal tools in minutes. With the SQL Generate feature, you can input natural language and get SQL statements that can be run directly. This works in databases like MySQL, Postgre, Supabase, etc. We offer developers a high degree of freedom to implement richer functionality through JavaScript, wrapping JS statements with {{Template Syntax}} to place at any string type variable spaces for more variety in the output. ILLA can connect to the mainstream databases or any data connected through APIs and add actions to chain to user events. It tightly integrates the data obtained from the back-end with the front-end components, allowing developers to write simple data calls to achieve massive information interaction.

2 Ratings

Starting Price: $10 per editor per month

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Onsen UI

Experience streamlined development with zero-time setup, using the technologies you already know and love - Javascript, HTML and CSS. Worried that PhoneGap / Cordova apps are slow? Fear not! All animations in Onsen UI have been tuned and optimized to perform well on a wide range of devices. We take great care to ensure that apps made using Onsen UI feel smooth even on lower end devices. Onsen UI is easy to learn while being a powerful tool to create complex mobile apps. We have lots of learning resources including official documentation, an interactive tutorial and a community forum where your questions get answered. A rich variety of UI components specially designed for mobile apps. Onsen UI provides tabs, side menu, stack navigation and tons of other components such as lists and forms.

1 Rating

Starting Price: Free

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Selenium WebDriver

Selenium

Selenium WebDriver drives a browser natively, as a real user would, either locally or on remote machines. WebDriver is simple, it is designed as a concise and compact programming interface. Through a simple setup, WebDriver can be used with all major browsers. Automate real user interactions in Firefox, Safari, Edge, Chrome, Internet Explorer and more! Selenium WebDriver refers to both the language bindings and the implementations of the individual browser controlling code. This is commonly referred to as just WebDriver. The W3C is an international community that works to develop Web standards. In June 2018, WebDriver became a W3C recommendation. Major browser vendors (Mozilla, Google, Apple, Microsoft) support WebDriver and work constantly to improve the browsers and browser controlling code, which leads to a more uniform behavior across the different browsers, making your automation scripts more stable.

1 Rating

Starting Price: Free

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Material UI (MUI)

MUI

MUI offers a comprehensive suite of UI tools to help you ship new features faster. Start with Material UI, our fully-loaded component library, or bring your own design system to our production-ready components. Build at an accelerated pace without sacrificing flexibility or control. Every component you need is ready for production. Build beautiful UIs with ease. Start with Google's Material Design, or create your own sophisticated theme. Our components are as flexible as they are powerful. You always have full control over how they look and behave. We believe in building for everyone. That's why accessibility is one of our highest priorities with every new feature we ship. Find out why MUI's tools are trusted by thousands of open source developers and teams around the world. Get a growing list of components, ready-to-use, free forever, and with accessibility always in mind. We've built the foundational UI blocks for your design system so you don't have to.

2 Ratings

Starting Price: $15 per month

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Appsmith

Appsmith is a low code developer tool for quickly building UIs and connecting to a wide range of data sources. You can drag and drop pre-built components to build UI on the open grid-style canvas. When it comes to adding logic, transforming data, and defining workflows. Appsmith lets you insert plain Javascript right inside any widget, query, or almost any other setting. - Start by linking to an existing datasource such as a database or an API. Appsmith has plug-and-play support for most databases, Rest APIs, and GraphQL, so you can seamlessly import your data. - Next, you can use pre-made widgets to easily layout an app, and move them around to optimize usability - Get the app running by connecting the UI to the datasource. You can do this by writing queries or calling APIs. Remember, you can control everything with JavaScript! - Finally, deploy the app. You can also integrate with your CI/CD, create git branches for different environments to safely develop, test and deploy

Starting Price: $0.4/hour/user

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Zeroheight

zeroheight

zeroheight helps teams create, manage and maintain their design systems. Using zeroheight, designers, engineers, and product teams can collaborate and build design systems that can be easily shared across teams. Create a centralized repository of styles, tokens, guidelines, code, components, and patterns, integrated and synced between the tools you already use. zeroheight makes maintaining consistency across different products easier and reduces the time and effort needed to stand up new brands and products confidently. We offer features that suit teams from startup to enterprise, from governance to analytics to automation.

Starting Price: Free

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Syncfusion Essential Studio

Syncfusion

Includes more than 1,600 components and frameworks for Windows Forms, WPF, ASP.NET (Web Forms, MVC, Core), UWP, WinUI, Xamarin, Flutter, JavaScript, Angular, Blazor, Vue and React. Includes top requested components such as charts, grids, schedulers, diagrams, maps, gauges, docking, ribbons, and many more! Working with the industry’s best and brightest minds to streamline your business. Includes more than 1,700 components and frameworks for major platforms. A wide range of product demos and training, including video tutorials, documentation, and KBs. Every control is fine-tuned to work with a high volume of data. Create powerful apps by viewing and editing Excel, PDF, Word, and PowerPoint files. Truly unlimited dedicated support system via the public forum, feature & feedback page, live chat, and support tickets. Easy integration of tools to blend Syncfusion controls with your project.

Starting Price: $495 one-time payment

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Leaflet

Leaflet is the leading open-source JavaScript library for mobile-friendly interactive maps. Weighing just about 42 KB of JS, it has all the mapping features most developers ever need. Leaflet is designed with simplicity, performance, and usability in mind. It works efficiently across all major desktop and mobile platforms, can be extended with lots of plugins, has a beautiful, easy-to-use, and well-documented API, and a simple, readable source code that is a joy to contribute to. Leaflet doesn't try to do everything for everyone. Instead, it focuses on making the basic things work perfectly. Hardware acceleration on mobile makes it feel as smooth as native apps. Utilizing CSS3 features to make panning and zooming really smooth. Smart polyline/polygon rendering with dynamic clipping and simplification makes it very fast. The modular build system for leaving out features you don't need. Tap delay elimination on mobile.

Starting Price: Free

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Polymer

The Polymer library provides a set of features for creating custom elements. These features are designed to make it easier and faster to make custom elements that work like standard DOM elements. Similar to standard DOM elements, Polymer elements can be instantiated using a constructor or document creation element, configured using attributes or properties, populated with internal DOM inside each instance, responsive to property and attribute changes, styled with internal defaults or externally, and responsive to methods that manipulate its internal state. Registering an element associates a class with a custom element name. The element provides callbacks to manage its lifecycle. Polymer also lets you declare properties, to integrate your element's property API with the Polymer data system. Shadow DOM provides a local, encapsulated DOM tree for your element. Polymer can automatically create and populate a shadow tree for your element from a DOM template.

Starting Price: Free

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WinJS

Microsoft is committed to making sure that WinJS continues to run for existing customers. At this time we don't have plans to invest in new features or feature requests. Bug fixes will be limited to correcting substantial issues that are blocking customer deployments. We may also consider bug fixes to help our customers maintain their existing WinJS-based apps. You can contribute by reviewing and sending feedback on code checkins, suggesting and trying out new features as they are implemented, submitting bugs and helping us verify fixes as they are checked in, as well as submitting code fixes or code contributions of your own. Note that all code submissions will be rigorously reviewed and tested by the team, and only those that meet an extremely high bar for both quality and design appropriateness will be merged into the source.

Starting Price: Free

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Oracle Data Access Components (ODAC)

Oracle

Oracle Data Access Components (ODAC) are a set of Windows and .NET data access drivers and tools. They include support for .NET data access, Microsoft Visual Studio tools for developing Oracle database applications; and ASP.NET providers. ODAC provides comprehensive client support for advanced Oracle database functionality, including performance, high availability, and security, among other features. It is tightly integrated with Visual Studio to provide a seamless development experience for developers. Oracle Data Provider for .NET is an implementation of Microsoft's ADO.NET interface and provides access to Oracle databases. OLAP Data Manipulation Language (OLAP DML) is used to define and manipulate analytic workspace objects. High performance, a feature-rich mechanism for Microsoft ADO and OLE DB data access to Oracle databases, its usage, and its configuration. Provides introductory, installation, post-installation configuration, and usage information.

Starting Price: Free

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React Toolbox

Bootstrap your application with beautiful Material Design components. React Toolbox is a set of React components that implements Google Material Design specification. It's built on top of some of the trendiest proposals like CSS Modules (written in SASS), Webpack, and ES6. The library harmoniously integrates with your Webpack workflow and it's easily customizable and very flexible. Check our awesome documentation (which is built using React Toolbox) and try all the components with live examples. We've created a playground so you don't need to install anything to fall in love with our components, so fun! The app bar is a special kind of toolbar that’s used for branding, navigation, search, and actions. Usually, it contains controls on the right and left side and a title with the current section or app name. You should give the content with children elements. Consists of text, an image, or both, designed in accordance with your app’s color theme.

Starting Price: Free

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WTForms

WTForms is a flexible forms validation and rendering library for Python web development. It can work with whatever web framework and template engine you choose. It supports data validation, CSRF protection, internationalization (I18N), and more. There are various community libraries that provide closer integration with popular frameworks. WTForms tries to provide as usable an API as possible. We’ve listed here some of the known libraries to work with WTForms, but if it’s not listed, it doesn’t mean it won’t work. Pretty much any ORM or object-DB should work, as long as data objects allow attribute access to their members. WTForms uses unicode strings throughout the source code and assumes that form input has already been coerced to unicode by your framework. WTForms fields render to unicode strings by default, and therefore as long as your templating engine can work with that, you should have no unicode issues.

Starting Price: Free

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zope.interface

Python Software Foundation

This package is intended to be independently reusable in any Python project. It is maintained by the Zope Toolkit project. This package provides an implementation of “object interfaces” for Python. Interfaces are a mechanism for labeling objects as conforming to a given API or contract. So, this package can be considered as an implementation of the Design By Contract methodology support in Python. Interfaces are objects that specify (document) the external behavior of objects that “provide” them. An interface specifies behavior through informal documentation in a doc string, attribute definitions, and invariants, which are conditions that must hold for objects that provide the interface. Attribute definitions specify specific attributes. They define the attribute name and provide documentation and constraints of attribute values. Attribute definitions can take a number of forms.

Starting Price: Free

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Hope UI

Iqonic Design

As the name suggests, Hope UI is the revolutionary admin dashboard built with the developer's aspirations and needs in the first place. Hope UI Laravel Admin Dashboard Template and UI component set is designed with a modular component structure to help design and launch web applications in the fastest way possible. Being able to develop lightweight web applications and admin panels, Hope UI Admin Template comes with a Live Customizer to cut down on development time and coding hours. The Hope UI Bootstrap Admin Dashboard brings the future of admin UI to power your present and future development. Hope UI is available in 8 different technologies which are Bootstrap, Vue JS, React JS, Laravel, CodeIgniter, Figma, XD and Sketch UI Kit and more versions like Tailwind, Angular, React Native, etc are in the roadmap.

Starting Price: $99 per year

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TeeChart

Steema Software

Full 100% Delphi source code is available to you as an option. Discover the user-friendly editor dialogs, available both at design time and also run-time, for almost every component and sub-component. Steema provides products and services aimed at meeting your highest expectations on getting the best value for your money. We have been innovating for TeeChart components since 1995 and endeavor to continue to bring you the best of new features in the future. You can also use TeeChart (sourcecode version only) with FMXLinux to port/build your charting applications to/for Linux with Embarcadero Delphi 10.2 Tokyo and up. TeeChart will scale and fit to any screen size. If you're building dashboards you can place multiple, resizeable charts on each dashboard panel. FireMonkey framework will handle most of the variations for the different platforms. See examples showing how to use TeeChart for FireMonkey apps.

Starting Price: $99 per year

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Vega-Altair

The Vega-Altair open-source project is not affiliated with Altair Engineering, Inc. With Vega-Altair, you can spend more time understanding your data and its meaning. Altair’s API is simple, friendly and consistent and built on top of the powerful Vega-Lite visualization grammar. This elegant simplicity produces beautiful and effective visualizations with a minimal amount of code. The key idea is that you are declaring links between data columns and visual encoding channels, such as the x-axis, y-axis, color, etc. The rest of the plot details are handled automatically. Building on this declarative plotting idea, a surprising range of simple to sophisticated plots and visualizations can be created using relatively concise grammar.

Starting Price: Free

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Matplotlib

Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations in Python. Matplotlib makes easy things easy and hard things possible. A large number of third party packages extend and build on Matplotlib functionality, including several higher-level plotting interfaces (seaborn, HoloViews, ggplot, ...), and a projection and mapping toolkit (Cartopy).

Starting Price: Free

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shadcn/ui

Shadcn/ui is an open source collection of beautifully designed, accessible, and customizable components that developers can seamlessly integrate into their applications. Built with Tailwind CSS, these components are designed for easy copying and pasting, facilitating rapid development without compromising on design quality. The library offers a diverse range of components, including buttons, sidebars, avatars, tabs, and charts, all crafted to ensure both aesthetic appeal and functional excellence. Shadcn UI emphasizes composability and theming, allowing developers to tailor components to align with specific project requirements and branding guidelines. The platform provides comprehensive documentation and examples, aiding developers in effectively implementing and customizing components within their projects. By leveraging Shadcn UI, developers can expedite the creation of user interfaces, ensuring consistency and accessibility across applications.

Starting Price: Free

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Mantine

Mantine is a comprehensive React component library designed to facilitate the rapid development of accessible and fully functional web applications. It offers over 100 customizable components and 50 hooks, encompassing a wide range of UI elements such as inputs, buttons, modals, popovers, typography, and layout management tools. Built with TypeScript, Mantine ensures type safety across applications, and its components are compatible with modern frameworks like Next.js and Remix. The library provides native support for dark themes, allowing developers to implement dark mode with minimal configuration. Customization is a key feature, with components supporting extensive visual modifications through props, enabling quick prototyping and experimentation. Mantine also facilitates flexible theming, allowing the extension of the default theme with additional colors, shadows, radius, spacing, fonts, and other properties to meet specific design requirements.

Starting Price: Free

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Flowbite

Flowbite is an open-source library of interactive UI components built on top of Tailwind CSS, designed to expedite web development by providing a comprehensive set of pre-designed elements. It offers over 56 types of components, including buttons, alerts, breadcrumbs, pagination, and navbars, as well as interactive elements like dropdowns, modals, and tooltips, which are enhanced by custom JavaScript for added interactivity. Developers can integrate Flowbite into existing Tailwind CSS projects via npm or CDN, and it supports various frameworks such as React, Vue.js, Angular, and Next.js. The library also includes a Figma design system, enabling designers to prototype and design applications before development. For those seeking advanced features, Flowbite offers a Pro version with additional components and templates. The ecosystem is further enriched by Flowbite Blocks, providing over 450 website sections and advanced UI components built with Tailwind CSS.

Starting Price: $289 one-time payment

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daisyUI

DaisyUI is a Tailwind CSS component library that enhances development efficiency by providing semantic class names for UI components, such as cards and toggles. This approach reduces the need to write extensive utility classes, resulting in cleaner and more maintainable HTML. DaisyUI is built on top of Tailwind CSS, allowing developers to customize components using Tailwind's utility classes. It operates as a pure CSS plugin without JavaScript dependencies, ensuring compatibility across various JavaScript frameworks. Installation is straightforward, and it supports unlimited themes through customizable color names that utilize CSS variables, facilitating features like dark mode without additional class names. daisyUI is built on top of Tailwind CSS so you can customize everything using utility classes. daisyUI is a plugin for Tailwind CSS. It works on all JS frameworks and doesn't need a JS bundle file.

Starting Price: $49 one-time payment

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SaaS Hammer

SaaS Hammer is a comprehensive Django SaaS template designed to accelerate product development by integrating Django with Hotwire, thereby enhancing productivity and enabling developers to focus on perfecting their products. It offers a modern frontend development workflow utilizing Webpack and SWC (Speedy Web Compiler), complete with live reload functionality for immediate feedback during development. The template incorporates Tailwind CSS for crafting clean user interfaces and provides built-in support for TypeScript. SaaS Hammer includes a component library featuring reusable UI elements such as buttons, modals, tabs, date-time widgets, select widgets, rich text editors, and various chart types, facilitating rapid UI development. Content management, integrates Wagtail CMS, allowing for the swift creation and updating of pages without direct template modifications. The template supports user authentication with features like signup, email confirmation, and more.

Starting Price: $299 one-time payment

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SVAR UI

SVAR

SVAR offers a collection of open-source, customizable UI components designed to simplify and enhance web application development. Compatible with React, Svelte, and Vue, SVAR components include feature-rich DataGrid for managing tabular data, interactive Gantt Chart for visualizing project timelines, a robust File Manager, and a rich UI library of form controls. With a focus on flexibility, performance, and responsiveness, SVAR UI equips you with the advanced tools needed to build modern, data-driven web apps efficiently. All components are easy customizable, blazing fast and well-documented.

Starting Price: $0

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Fluree

Fluree is an immutable RDF graph database written in Clojure and adhering to W3C standards, supporting JSON and JSON-LD while accommodating various RDF ontologies; it boasts a scalable, cloud-native architecture utilizing a lightweight Java runtime, with individually scalable ledger and graph database components, embodying a "Data-Centric" ideology that treats data as a reusable asset independent of singular applications, underpinned by an immutable ledger that secures transactions with cryptographic integrity, alongside a rich RDF graph database capable of various queries, and employs SmartFunctions for enforcing data management rules, including identity and access management and data quality.

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Float UI

MarsX

Float UI empowers non-designers to create sleek, modern websites with ease, thanks to its user-friendly interface and open-source design components. Float UI is a platform that allows users to create modern websites without requiring design knowledge. The platform is open source and free, making it accessible to everyone. It includes a collection of responsive user interface components and website templates with modern designs, making it easy for users to develop websites quickly. With Float UI, users can optimize their website development projects and achieve professional results.

Starting Price: $0

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Compare the Top Free Component Libraries as of April 2025

What are Free Component Libraries?

DHTMLX

Flutter

Ionic

ILLA Cloud

Onsen UI

Selenium WebDriver

Material UI (MUI)

Appsmith

Zeroheight

Syncfusion Essential Studio

Leaflet

Polymer

WinJS

Oracle Data Access Components (ODAC)

React Toolbox

WTForms

zope.interface

Hope UI

TeeChart

Vega-Altair

Matplotlib

shadcn/ui

Mantine

Flowbite

daisyUI

SaaS Hammer

SVAR UI

Fluree

Float UI

Best Free Component Libraries

Compare the Top Free Component Libraries as of April 2025

What are Free Component Libraries?

DHTMLX

Flutter

Ionic

ILLA Cloud

Onsen UI

Selenium WebDriver

Material UI (MUI)

Appsmith

Zeroheight

Syncfusion Essential Studio

Leaflet

Polymer

WinJS

Oracle Data Access Components (ODAC)

React Toolbox

WTForms

zope.interface

Hope UI

TeeChart

Vega-Altair

Matplotlib

shadcn/ui

Mantine

Flowbite

daisyUI

SaaS Hammer

SVAR UI

Fluree

Float UI

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