Open-source alternatives to Clarity

Semi Design is a React UI component library and design token system used to build web application frontends. It provides a collection of pre-built interface elements and a framework of visual constants to maintain consistent branding across a product. The project features a design-to-code workflow that converts visual design drafts into production-ready React code and stylesheets. It includes an internationalization framework for adapting interfaces to different languages and text layouts, as well as a web component wrapper to isolate UI elements for use in SDKs and browser plugins. The libr

This project is a comprehensive design system framework for building accessible, responsive, and consistent web interfaces. It provides a centralized architecture for managing visual properties and standardized component blueprints, ensuring that branding and interaction patterns remain uniform across diverse applications. The framework distinguishes itself through an accessibility-first approach, embedding semantic markup and inclusive design standards directly into its component blueprints. By utilizing a design-token-driven styling system, it centralizes visual values like typography, spac

Pigment CSS is a framework-agnostic styling tool that moves component style processing from the browser runtime to the build phase. By parsing component source code and theme configurations during compilation, it generates standalone, optimized CSS files and standard class names, effectively eliminating the need for runtime style calculation. The library provides a system for managing design tokens, such as colors and spacing, by transforming them into native CSS variables. This approach allows for dynamic styling and theme-aware logic without requiring a JavaScript-based engine. It also supp

Carbon is an enterprise design system that provides a comprehensive collection of reusable UI components, design tokens, and guidelines for building professional web applications. It functions as a CSS framework that enforces a unified design language across projects through standardized typography, spacing, and color palettes. The system utilizes a platform-agnostic design token system to maintain visual consistency across different technologies. This includes centralized management of brand colors, motion easing curves, and a curated library of accessible SVG icons. The framework covers a

The United States Web Design System is a government design system and accessible UI framework. It provides a collection of standardized CSS and JavaScript components, along with a CSS component library, specifically designed for building consistent federal government websites. The system allows for custom CSS theme development through the use of design tokens for colors, spacing, and typography. Users can customize visual themes and compile custom styles to maintain a unified brand identity across multiple web properties. The framework covers responsive interface design and web accessibility

Web Components is a set of specifications for creating reusable custom elements with encapsulated styling and logic for the web. It provides a standard for defining new HTML tags that function as independent components across different browser engines. The system is built on three primary pillars: the Custom Elements standard for defining new tags, the Shadow DOM implementation for isolating internal document structures and styles, and the HTML Templates specification for defining reusable fragments of markup that remain inert until instantiated. These capabilities enable modular web design

TDesign is an enterprise design system and cross-platform UI component library. It provides a comprehensive set of design guidelines and reusable interface elements intended for building consistent professional business applications across different operating systems and browsers. The project utilizes a design token system to centralize visual variables for colors and typography, allowing for corporate brand customization. It ensures a uniform look and feel through shared UI specifications and a centralized set of visual variables. The system includes a UI framework starter kit with command

This project is a software engineering style guide and a curated collection of architectural patterns and coding standards. It provides a multi-language coding standard to ensure maintainable software across Ruby, Python, JavaScript, and Swift. The project establishes a development workflow specification for version control, continuous integration, and peer review to maintain a linear project history. It also includes a web accessibility framework based on ARIA and WCAG standards, using design tokens and semantic HTML patterns to build inclusive interfaces. The guides cover a broad range of

This project is an enterprise design system and web interface framework that provides a React component library for building consistent user experiences. It serves as a design-to-code workflow bridge, synchronizing product design tools with frontend implementation to accelerate development speed. The framework focuses on design-to-code synchronization and the construction of enterprise design systems. It enables the standardization of visual components and the composition of complex web and mobile screens using unified interface elements and layout patterns. The library implements a design-t

This project is a web component tooling system used to compile TypeScript and JSX into standard-compliant custom elements. It enables the development of framework-agnostic components that function across different browsers and frontend environments. The toolset focuses on cross-framework UI distribution, allowing a single library of components to be used in React, Angular, Vue, or plain HTML. It includes capabilities for enterprise design system engineering and generates specific wrapper code to ensure components behave as native elements within various frameworks. The system covers server-s

Taiga UI is an Angular UI component library and accessible design system used for building enterprise web interfaces. It provides a comprehensive collection of reusable interface elements and layout tools, functioning as a mobile-first UI kit with responsive components that adapt to different device capabilities. The library distinguishes itself through an integrated data visualization library featuring various chart types and a dedicated form management framework with built-in validation and formatting for specialized data. It also features AI-driven development workflows by integrating comp

Fluent UI is a design system framework and TypeScript UI toolkit providing a comprehensive set of styles and accessibility guidelines. It functions as a React UI component library and a web component library, offering a collection of pre-styled elements and layout utilities to create a cohesive visual experience across web platforms. The project translates a brand design language into a functional library of reusable components, ensuring cross-product visual consistency. It enables the implementation of design systems for enterprise web applications through the use of standardized visual and

This project is a collection of reusable UI component libraries for the Angular framework. It serves as an accessibility framework and a suite of building blocks for constructing user interfaces. The library provides a specialized component suite for implementing Material Design visual and interaction specifications. It also includes dedicated integrations for embedding interactive Google Maps with geographic data overlays and integrating YouTube video players with support for deferred loading. The project covers a broad range of UI development capabilities, including the creation of accessi

Webstudio is a visual CMS and website builder that provides a visual development environment for designing and publishing websites. It functions as an AI-powered design tool, a REST and GraphQL API client, and an atomic CSS compiler. The platform distinguishes itself through generative AI capabilities for creating layout variants and refining visual styles from text prompts. It integrates a headless CMS workflow that maps external data sources to visual components and utilizes a specialized compiler to convert design tokens into deduplicated atomic CSS for optimized page load speeds. The sys

Gentelella is a collection of pre-configured interface templates and a component library designed for building administration panels, data dashboards, and internal management consoles. It provides a Bootstrap 5 based framework that includes accessible web interface templates and PWA-ready dashboard shells. The project features specialized templates for data visualization, utilizing modular chart factories to render line, bar, radar, and heatmap visualizations. It includes a set of ready-to-use interface elements for enterprise prototyping, such as kanban boards, file managers, and interactive

This project is a collection of accessible user interface components designed for full developer ownership. It functions as a copy-paste UI framework and headless component kit, providing the logic and structure for interface elements without relying on traditional versioned library dependencies. The system distributes source code directly to the user, allowing for the creation of a custom component library. It utilizes a distribution method where components are copied into the codebase, ensuring that the visual and functional implementation remains under the developer's control. The toolkit

StyleX is a type-safe CSS-in-JS library and atomic CSS compiler that transforms JavaScript style definitions into optimized static CSS and type-safe class names. It functions as a multi-framework styling tool, generating standard CSS assets compatible with various JavaScript UI frameworks and server components. The system includes a CSS design token system and theme engine for managing shared constants and composing visual schemes. It allows for the creation of light, dark, and custom themes through variable overrides and token inheritance. The project covers component styling through object

Effector is a reactive state management library and data flow orchestrator designed for building complex, event-driven applications. It models application logic as a directed acyclic graph, where state updates and asynchronous side effects propagate automatically through declarative pipelines. By decoupling business logic from user interface layers, it allows developers to maintain state in independent containers that communicate via standard interfaces, ensuring the system remains framework-agnostic. The library distinguishes itself through its robust support for isolated execution scopes, w

Arco Design is a React UI component library and design system framework used to build professional web interfaces. It provides a collection of pre-built visual elements and layouts designed to maintain a consistent design language across applications. The system features a token-based theming engine that utilizes hierarchical design variables and CSS variables to enable granular visual customization. This allows for the modification of global and component-level styles through a dedicated theme editor or loader to align the interface with specific brand identities. The framework supports ent

Angular powered Bootstrap

Swiper is a modular, touch-enabled library designed for building interactive content carousels and sliders for web and mobile applications. It provides a high-performance rendering engine that manages large datasets by dynamically creating and destroying elements based on their proximity to the viewport, ensuring memory efficiency and smooth operation. The library distinguishes itself through a plugin-based architecture that allows developers to include only the specific functionality required for their project, effectively minimizing bundle sizes. It features a hardware-accelerated animation

N3-components is a library of modular, reusable user interface elements designed for the Vue framework. It functions as a toolkit for constructing web application layouts by providing a collection of standardized building blocks that ensure consistent behavior and a unified design language across projects. The library enables developers to assemble complex interfaces through a component-based architecture that supports scoped styling and flexible content projection. It facilitates the creation of scalable frontends by allowing for the customization of visual properties through centralized con

Evergreen is a React UI component library and design system framework. It provides a collection of pre-styled, accessible interface elements used to build consistent web applications. The library functions as a server-side rendered UI kit, allowing components to generate HTML on the server to improve page load speeds and search engine visibility. It includes a centralized styling layer for managing colors, typography, and spacing through custom UI theming. The framework covers accessible web design and enterprise interface design, utilizing a token-based styling system to maintain a uniform

This project is a cross-platform user interface framework that maps mobile-native component primitives to standard web elements. It enables developers to build consistent applications that function across both mobile and web environments by providing a unified library of components and shared logic. The framework distinguishes itself through a specialized style engine that converts JavaScript object-based declarations into optimized, scoped CSS at runtime. It also features a responsive layout engine that implements a flexbox-based system, ensuring that interfaces adapt dynamically to differen

Heroicons is a collection of hand-crafted, scalable vector icons designed for use in web interfaces and digital product design systems. These graphical symbols are provided as a library of vector assets that integrate directly into user interface code to support visual communication and navigation. The icons are defined as vector paths, allowing them to be embedded directly into the document object model. This approach enables the use of standard style rules to control appearance properties such as color and stroke width, ensuring visual consistency across different parts of an application.

Omi is a web components framework, reactive UI library, and client-side routing engine. It provides a system for building modular and reusable interface elements based on standard browser web components, using signals to synchronize data changes and update the user interface automatically. The project functions as a cross-framework component tool, exporting standard web elements that operate consistently across different third-party JavaScript libraries. Its capabilities include single-page application navigation and view routing. It also covers reactive state management, component style man

Lit is a library for building lightweight, interoperable web components. It provides a base class that leverages native browser APIs to encapsulate state, logic, and styles, allowing developers to create custom elements that function consistently across any modern web project. The framework distinguishes itself through a reactive property system that automatically triggers efficient, batched DOM updates. By utilizing tagged template literals, it defines declarative UI structures that are compiled into optimized update instructions. Its architecture emphasizes modularity through a reactive con