Best Free Component Libraries of 2025

DHTMLX is a powerful and easy-to-use JavaScript UI library that provides a wide range of customizable and flexible components for building modern and responsive web applications. It offers 30+ full-featured UI widgets, including grids, charts, diagrams, schedulers, gantt charts, calendars, trees, forms, and more. These components are optimized for fast rendering, ensuring that your application runs smoothly in all browsers and devices. DHTMLX is compatible with popular web frameworks such as React, Angular, and Vue.js. This makes it an excellent choice for developers who are already working with these frameworks and want to add a powerful UI library to their projects. Moreover, DHTMLX supports different data sources and formats, making it easy to integrate with various back-end technologies. DHTMLX provides extensive configuration and customization abilities for its UI components, allowing developers to tailor their appearance and behavior to meet specific application requirements and extend its functionality with custom features if needed. DHTMLX also has comprehensive documentation that covers every aspect of the library, including detailed API references, tutorials, and code examples, as well as an active community.

Flutter is a user interface toolkit developed by Google that enables the creation of stunning, natively compiled applications for mobile, web, and desktop platforms from a single codebase. With its Stateful Hot Reload feature, you can bring your app to life in mere milliseconds. The toolkit offers a vast array of fully-customizable widgets that allow developers to construct native interfaces in just minutes. This swift development process emphasizes delivering features that enhance the native user experience. Its layered architecture provides extensive customization options, leading to rapid rendering and designs that are both expressive and adaptable. Flutter’s widgets are designed to accommodate essential platform-specific variations, including scrolling, navigation, icons, and fonts, while the Flutter code is compiled into native ARM machine code using Dart's native compilers. The hot reload capability significantly streamlines workflows, enabling developers to experiment, create user interfaces, introduce new features, and resolve bugs more efficiently. With Flutter, you can enjoy sub-second reload times without losing the state of your application, whether you're working on emulators, simulators, or physical devices. This seamless experience fosters a more agile development process, making it easier to innovate and iterate on app designs.

Ionic Framework is an open-source UI toolkit that allows you to build high-quality, performant mobile and desktop apps with web technologies HTML, CSS and JavaScript. It also integrates with popular frameworks such as React and Angular. Install Ionic to get started or follow our First App Tutorial for the core concepts. Installation Guide. Guides that will guide you through the installation of the framework and setting it up. UI Components. Explore Ionic Framework's beautiful UI component library. Native Functionality. Integrate native device plugins like Bluetooth, Maps and HealthKit. Theming. Learn how to modify and customize the visual design of your Ionic app to suit your brand. Overview. Overview. Ionic Framework focuses primarily on the frontend UX of an app's UI interaction -- UI controls and interactions, gestures, animations. It is easy to use and integrates well with other libraries or frameworks such as Vue, React, and Angular.

Accelerate your internal tools development. Low-code platform that allows developers to create internal tools in just minutes. SQL Generate allows you to input natural language and generate SQL statements. This works with databases such as MySQL, Postgre and Supabase. We give developers a great deal of freedom in implementing richer functionality with JavaScript. Wrapping JS statements using Template syntax allows them to place any string type variables at any space for more variety. ILLA is able to connect to any data via APIs or mainstream databases and add actions that are chained to user events. It integrates data from the backend with the frontend components. Developers can write simple data calls for massive information interaction.

CopyElement provides a vast collection of Elementor components designed to simplify the web development process. With over 650 components ranging from navigation bars to full-page sections, CopyElement helps web designers quickly create stunning, fully responsive websites. The platform allows users to copy components with one click, easily customize them, and integrate them into their projects. Available for free, with premium options for advanced features, CopyElement saves time and boosts productivity for agencies and freelance designers.

Dash & Dash Enterprise allow you to build and deploy analytic web applications using Python, R, or Julia. No JavaScript or DevOps are required. The world's most successful companies offer AI, ML and Python analytics at a fraction of the cost of full-stack development. Dash is the way they do it. Apps and dashboards that run advanced analytics such as NLP, forecasting and computer vision can be delivered. You can work in Python, R, or Julia. Reduce costs by migrating legacy per-seat license software to Dash Enterprise's unlimited end-user pricing model. You can deploy and update Dash apps faster without an IT or DevOps staff. You can create pixel-perfect web apps and dashboards without having to write any CSS. Kubernetes makes it easy to scale. High availability support for mission-critical Python apps

A JavaScript UI library and framework designed to enhance web development efficiency, the JS Framework facilitates the creation of cross-platform web applications with an impressive collection of 102 UI widgets alongside feature-rich CSS and HTML5 JavaScript controls. By utilizing these pre-built widgets and UI components, developers can save over 3000 hours in development time, allowing them to build web user interfaces 30% faster. Our team has curated the finest design concepts, thoughtfully evaluating the user experience of each Webix component across five distinct conceptual designs. Additionally, our knowledgeable support service team is well-versed in the intricacies of our library and is ready to assist with any challenges you may encounter. For further engagement, we offer an official support forum where users can interact and troubleshoot alongside our developers. Employing the Webix JS framework ensures that your project benefits from clean and lightweight code grounded in object-oriented programming principles, while also allowing seamless integration with the jQuery library, MVC frameworks such as AngularJS, React, Vue.js, and Backbone.js, as well as third-party UI extensions, enriching the overall development experience. This comprehensive solution not only accelerates the development process but also enhances the functionality and design of your web applications.

MUI provides an extensive array of user interface tools designed to accelerate the development of new features. You can begin with Material UI, our robust library of components, or integrate your own design system with our production-ready elements. This allows you to work more quickly while maintaining flexibility and control over your designs. Each component is prepared for immediate use, enabling you to create stunning user interfaces effortlessly. You can start with Google's Material Design or develop a unique, sophisticated theme that reflects your vision. Our components combine flexibility and power, allowing you to customize their appearance and functionality fully. We prioritize inclusivity in our designs; hence, accessibility remains a key focus in every feature we release. Discover why MUI's tools are relied upon by countless developers and teams globally. With an ever-expanding collection of components available for free, you'll find that they are designed with accessibility in mind. We have laid down the essential UI elements for your design system, alleviating you from that task, and enabling you to focus on building innovative solutions for your users. In a world where user experience is paramount, MUI is committed to delivering excellence in every aspect of UI development.

Cryptography encompasses both high-level methods and low-level interfaces for standard cryptographic techniques, including symmetric ciphers, message digests, and key derivation functions. By utilizing the high-level symmetric encryption method provided by cryptography, users can easily perform encryption tasks. The field of cryptography is generally classified into two distinct levels: one featuring secure recipes that are straightforward to use with minimal configuration requirements, making them accessible for developers with little decision-making involved. Conversely, the other level comprises low-level cryptographic primitives that pose significant risks if misapplied, necessitating a thorough understanding of advanced cryptographic principles and careful decision-making. Due to these inherent risks, this lower tier is often labeled as the "hazardous materials" or "hazmat" layer, with relevant resources located in the cryptography.hazmat package, where documentation always includes a warning at the beginning to highlight the associated dangers. Additionally, mastering these low-level interfaces can lead to powerful custom implementations, but they demand a commitment to learning and adhering to best practices in cryptographic security.

Untitled UI stands as the largest Figma UI kit, React component library, and icon system in the world, equipping both designers and developers with all the essentials to rapidly create modern interfaces. Within the Figma library, users can explore an extensive array of over 900 global styles and variables related to color, typography, and effects, alongside more than 10,000 intricately designed components and variants, 420 ready-made page layouts for desktop and mobile, and 4,600 neutral icons and logos, all seamlessly integrated into a single cohesive design system. On the development front, Untitled UI React offers a comprehensive open-source collection of production-ready components built using React v19.1, Tailwind CSS v4.1, TypeScript v5.8, and React Aria, prioritizing type safety, accessibility features like keyboard navigation and screen-reader compatibility, while delivering exceptional performance without vendor lock-in. Furthermore, the AI-ready Lovable and bolt.new kits facilitate instant prototyping through straightforward prompts, enhancing the user experience with smooth Figma previews and consistent styling across both development environments. This combination not only streamlines workflows but also empowers teams to focus on creativity and innovation.

Appsmith enables organizations to create custom internal applications quickly with minimal coding. The platform allows users to build applications by connecting data sources, APIs, and workflows through a user-friendly drag-and-drop interface. Appsmith's flexibility with JavaScript lets developers fully customize components, while the open-source architecture and enterprise security features ensure scalability and compliance. With self-hosting and cloud deployment options, businesses can choose the best setup for their needs, whether for simple dashboards or complex business applications. Appsmith offers a comprehensive solution for creating and deploying custom AI agents that can automate key business processes. Designed for sales, support, and people management teams, the platform allows companies to embed conversational agents into their systems. Appsmith's AI agents enhance operational efficiency by managing routine tasks, providing real-time insights, and boosting team productivity, all while leveraging secure data.

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.

More than 1,600 components and frameworks are included for Windows Forms (WPF, ASP.NET Core), UWP and WinUI (Web Forms MVC, Core), UWP and WinUI (Xamarin and Flutter), Angular, Blazor and Vue, and React. You will find the most requested components like charts, grids and schedulers, diagrams maps gauges docking, ribbons and more! To streamline your business, we work with the best and brightest minds in the industry.

Start building modern, data-rich applications with the tools you need. Ignite UI is the most comprehensive library of 120+ UI components for every major framework. Designed and built with developers in mind, it includes the fastest data grids, data charts, and series types on the planet optimized for speed, performance, scalability, and the best data visualization capabilities. The extensive library encompasses any framework development teams want to build apps for: Angular, React, Web Components, Blazor, jQuery, WPF, Windows Forms, etc. To make the development process even more efficient, there are sophisticated Command Line Interface (CLI) tools that streamline the integration of component libraries. From advanced tools like the Spreadsheet, Pivot Grid, and DockManager responsive layouts and beautiful themes, to unmatched support from a global team, Ignite UI ensures your apps not only run fast but look great, delivering seamless UX across every framework and device.

Leaflet stands out as the premier open-source JavaScript library for creating mobile-responsive interactive maps. At around 42 KB in size, it encompasses all the essential mapping functionalities that developers typically require. The design prioritizes simplicity, efficiency, and user-friendliness. Compatible with all leading desktop and mobile platforms, it offers extensive plugin support, a visually appealing and intuitive API, and an easily navigable source code that encourages contributions. Rather than attempting to cater to every possible need, Leaflet emphasizes perfecting fundamental tasks. The use of hardware acceleration ensures a fluid experience similar to that of native applications. By leveraging CSS3 capabilities, it achieves exceptionally smooth panning and zooming. Additionally, it features intelligent polyline and polygon rendering, which incorporates dynamic clipping and simplification for enhanced speed. The modular architecture allows developers to omit unnecessary features, and it effectively eliminates tap delays on mobile devices, enhancing the overall user experience. This combination of attributes positions Leaflet as an excellent choice for developers seeking a reliable mapping solution.

The Polymer library offers a robust set of functionalities for developing custom elements, streamlining the process to ensure they behave like standard DOM elements. Just like conventional DOM elements, Polymer elements can be created through a constructor or by utilizing document creation methods, and they can be configured via attributes or properties. Each instance can contain an internal DOM, adapt to changes in properties and attributes, and receive styling both from internal defaults and external sources, all while responding to methods that alter their internal state. When you register a custom element, you link a class to a specific custom element name, and the element includes lifecycle callbacks to effectively manage its various stages. Additionally, Polymer facilitates property declarations, allowing for seamless integration of your element's property API with the Polymer data system. By employing Shadow DOM, your element gains a locally scoped and encapsulated DOM tree, and Polymer can automatically generate and fill a shadow tree for your element derived from a DOM template, enhancing the modularity and reusability of your code. This combination of features not only simplifies the creation of custom elements but also ensures they integrate smoothly into the wider ecosystem of web components.

Experience a seamless development process with instant setup, utilizing the familiar technologies you already appreciate—JavaScript, HTML, and CSS. If you're concerned about the performance of PhoneGap or Cordova applications, there's no need to worry! Onsen UI ensures that all animations are finely tuned and optimized for smooth performance across a diverse range of devices. We prioritize delivering a fluid experience for apps created with Onsen UI, even on less powerful devices. This framework is not only straightforward to master but also a robust solution for developing intricate mobile applications. A wealth of learning materials is available, including comprehensive documentation, an interactive tutorial, and a supportive community forum where you can get your queries resolved. Onsen UI boasts a wide array of UI components specifically crafted for mobile applications, offering features like tabs, side menus, stack navigation, and numerous other components such as lists and forms, allowing developers to create user-friendly interfaces effortlessly. With its extensive toolkit, Onsen UI empowers you to design engaging mobile experiences with ease and confidence.

Microsoft remains dedicated to ensuring that WinJS remains operational for its current user base. However, there are no current intentions to introduce new features or fulfill feature requests. Bug fixes will primarily focus on addressing critical issues that hinder customer deployments, and we may also look into resolving bugs to assist customers in maintaining their existing WinJS applications. Users can actively participate by reviewing and providing feedback on code submissions, suggesting and experimenting with new features as they are rolled out, reporting bugs, and verifying fixes as they are implemented, along with contributing their own code modifications. It is important to note that any code submissions will undergo a thorough review and testing process by the team, and only those that meet exceptionally high standards for quality and design will be accepted into the main codebase. Furthermore, your involvement can help enhance the overall stability and functionality of WinJS for everyone.

The speed at which an application enters the market can be crucial for its success. Unfortunately, numerous enterprises, agencies, and developers hinder their own progress by spending excessive time creating essential functionalities from the ground up, which ultimately prolongs development schedules. By utilizing pre-built features, your application can start with a solid framework, allowing for rapid advancement right from the outset. You can slash development time by up to 80%, enabling you to launch your application in mere days instead of months when utilizing Onymos's comprehensive, full-stack solutions. Each Onymos feature represents over a thousand hours of coding effort, and this figure continues to grow. Furthermore, when software or APIs undergo updates, so do our features, incorporating essential components such as UI/UX design, front-end logic, and integrated cloud services including Stripe, APNs, and Amazon S3. With Onymos Features, you receive a complete package that streamlines the development process. Organizations like Albertsons, CVS Pharmacy, and Walmart have already begun leveraging Onymos to build their apps, demonstrating the effectiveness of this innovative approach. Ultimately, choosing Onymos not only accelerates your project but also ensures it remains competitive and up-to-date in a rapidly evolving digital landscape.

Openpyxl is a Python library designed for reading and writing Excel 2010 files in formats such as xlsx, xlsm, xltx, and xltm. The library was developed due to the absence of a native solution for handling Office Open XML files in Python, and it owes its origins to the PHPExcel project. It is important to note that openpyxl does not provide protection against certain vulnerabilities like quadratic blowup or billion laughs XML attacks by default, but these risks can be mitigated by installing the defusedxml library. To install openpyxl, you can use pip, and it's recommended to perform this installation within a Python virtual environment to avoid conflicts with system packages. In some instances, you may want to work with a specific version of the library, especially if there are fixes that have not yet been released officially. Fortunately, you do not need to create an actual file on your filesystem to begin using openpyxl; simply import the Workbook class and begin your tasks. When you create sheets, they are automatically assigned names, and once you rename a worksheet, you can access it using the corresponding key from the workbook. This ease of use makes openpyxl a popular choice for many Python developers working with Excel files.

Autotuning in programming has shown significant improvements in performance and portability across various fields. Nevertheless, the portability of autotuners is often limited when transitioning between different projects, primarily due to the necessity of a domain-informed search space representation for optimal outcomes and the fact that no single search method is universally effective for all challenges. OpenTuner has emerged as a novel framework designed to create multi-objective program autotuners that are domain-specific. This framework offers fully customizable configuration representations, an extensible technique representation for incorporating domain-specific methodologies, and a user-friendly interface to interact with the programs being tuned. One of OpenTuner's standout features is its ability to utilize a combination of diverse search techniques simultaneously; those that demonstrate strong performance are allocated larger testing budgets, while those that underperform are phased out. Consequently, this adaptability enhances the overall efficiency and effectiveness of the autotuning process.

Oracle ADF Faces components offer a collection of more than 150 Ajax-enabled JSF components designed to enhance the development of sophisticated web user interfaces for Java EE applications. These components can be developed and deployed at no cost through Oracle ADF Essentials, making it accessible for developers. With extensive support for data visualization and compatibility with JSF 2, they provide a complete JavaScript API, a user-friendly drag-and-drop framework, and frameworks for dialog, popup, and navigation menus. Additionally, these components are designed with internationalization and accessibility in mind, as well as support for tablet and touch gestures. They facilitate declarative partial page rendering and allow for skinning and page templating, including reusable page regions and components. Furthermore, they are compatible with the Oracle Alta UI and integrate seamlessly with ADFc for TaskFlow functionality and bookmarking, as well as with ADFm for effective data binding. Overall, Oracle ADF Faces components empower developers to create dynamic and engaging web applications with ease.

Oracle Data Access Components (ODAC) encompass a collection of tools and drivers specifically designed for Windows and .NET environments. This suite not only facilitates .NET data access but also integrates Microsoft Visual Studio tools for creating applications that interface with Oracle databases, including ASP.NET providers. ODAC ensures extensive client support, optimizing advanced features of Oracle databases, such as enhanced performance, robust high availability, and stringent security measures. Moreover, it is seamlessly integrated with Visual Studio, offering developers a streamlined and efficient development environment. The Oracle Data Provider for .NET adheres to Microsoft’s ADO.NET interface, granting straightforward access to Oracle databases. Additionally, the OLAP Data Manipulation Language (OLAP DML) allows users to define and manipulate objects within analytic workspaces effectively. With a focus on high performance, ODAC offers a rich set of mechanisms for data access through Microsoft ADO and OLE DB, and it provides essential information regarding installation, post-installation setup, and operational guidelines to ensure users can utilize it to its fullest potential. Overall, ODAC serves as a comprehensive solution for developers working with Oracle databases in a .NET framework.

Parsel is a Python library licensed under BSD that facilitates the extraction and removal of data from HTML and XML documents using XPath and CSS selectors, with the option to integrate regular expressions. To begin, you create a selector object for the HTML or XML content you wish to analyze. After that, you can utilize either CSS or XPath expressions to target specific elements. CSS serves as a styling language for HTML, defining selectors that link styles to designated HTML elements, while XPath is utilized for selecting nodes within XML documents and can also be applied to HTML. Although both CSS and XPath can be used, CSS tends to offer greater readability, whereas XPath provides capabilities that may not be achievable through CSS alone. Built on top of lxml, parsel selectors incorporate some EXSLT extensions and come with pre-registered namespaces available for use in XPath queries. Furthermore, parsel selectors allow for the chaining of selectors, enabling users to primarily select by class using CSS and seamlessly transition to XPath when the situation demands it, enhancing flexibility in data extraction tasks. This dual capability makes parsel a powerful tool for developers working with web data.

Pexpect enhances the functionality of Python when it comes to managing other applications. This pure Python library excels at spawning child processes, overseeing them, and reacting to predefined output patterns. Similar to Don Libes’ Expect, Pexpect allows your scripts to interact with child applications as if a human were entering commands. It is particularly useful for automating the control of interactive applications such as ssh, FTP, passwd, and telnet. Additionally, Pexpect can facilitate the automation of setup scripts, making it easier to replicate software package installations across various servers. It is also valuable for conducting automated software testing. While Pexpect is inspired by the principles of Expect, it is entirely implemented in Python, setting it apart from other similar modules. Notably, Pexpect does not necessitate the use of TCL or Expect, nor does it require the compilation of C extensions. This feature makes it versatile across any platform that supports Python's standard pty module. The user-friendly design of the Pexpect interface ensures ease of use for developers. Overall, Pexpect stands out as an effective tool for automating and controlling various applications seamlessly.