Open-source alternatives to Devices.css

Skeleton is a Svelte Tailwind UI toolkit and adaptive component library. It provides a utility-first design system for building reactive web interfaces, focusing on consistent themes and typography across various screen sizes. The toolkit combines pre-styled components with layout tools to support responsive UI design and rapid frontend prototyping. It enables the creation of adaptive user interfaces through a standardized set of utility classes for styling and layout. The system covers high-level capabilities in Svelte web development and Tailwind CSS styling, utilizing a flexible grid syst

Airframe-react is a Bootstrap UI component library and starter kit for building React-based admin dashboards and management interfaces. It provides a preconfigured development foundation and a collection of production-ready interface elements to assemble consistent application screens. The project includes responsive web templates and pre-designed page layouts that automatically adapt content for desktop, tablet, and mobile screens. It enables the creation of administrative panels through a set of structural layout variations and a library of ready-made pages. The toolkit covers application

This project is a responsive Jekyll static site theme designed for technical blogs, documentation, and multilingual websites. It focuses on text readability and the presentation of technical content, providing a customizable CSS theme with multiple color palettes and dark mode toggling. The theme distinguishes itself through specialized rendering for technical assets, including mathematical formulas, diagrams, and syntax-highlighted code. It includes built-in internationalization support via translation keys to facilitate the creation of sites in multiple languages. The capability surface co

This project is a responsive portfolio website template designed to showcase professional background information and skills. It provides a structured layout that automatically adapts to various screen sizes, ensuring a consistent viewing experience across mobile, tablet, and desktop devices. The template distinguishes itself through a mobile-first design architecture that prioritizes small-screen performance before scaling content for larger displays. It includes a built-in theme-switching component that allows users to toggle between light and dark color schemes, as well as a smooth scrollin

Arco Design Vue is a Vue component library and design token system used to build consistent user interfaces. It provides a collection of pre-made visual components that handle common layout and interaction patterns. The framework features a tree-shakable architecture, allowing the removal of unused components and styles to reduce the final application bundle size. It utilizes a configuration framework based on JSON to customize colors, spacing, and visual styles across a project. The library covers broad capabilities for responsive web design and custom design system creation. It employs a t

react-responsive is a set of utility tools and hooks for evaluating CSS media queries within React components. It functions as a viewport state manager that detects screen dimensions and triggers user interface changes based on defined breakpoints. The project includes a helper for server-side rendering and automated testing that allows device properties to be overridden via context. This ensures consistent rendering when browser-native detection is unavailable. The library covers adaptive component rendering, viewport change monitoring, and responsive layout detection. It uses the native ma

mdui is a framework-agnostic UI library and design system based on Material Design 3 standards. It provides a comprehensive set of reusable interface elements implemented as native Web Components, ensuring compatibility across different JavaScript frameworks. The library features a sophisticated theming system that supports light and dark modes, as well as the ability to generate dynamic color palettes from seed colors or image sources. It distinguishes itself with a high level of flexibility in visual customization, using CSS custom properties to control design tokens such as typography, cor

North is a responsive web design methodology and Sass-based CSS architecture framework. It provides a system for building mobile-first user interfaces using fluid grids and progressive enhancement techniques to ensure a consistent experience across different browser capabilities and screen sizes. The project features a standardized CSS naming system that uses Sass mixins to programmatically generate class names, distinguishing between components, layouts, and states. It also functions as a frontend project scaffolding tool, providing a generator to bootstrap new environments with pre-configur

react-responsive is a media query library for React used to implement responsive design by conditionally rendering components based on viewport dimensions. It provides hooks and utilities for viewport detection and monitoring screen characteristics and orientation changes. The library includes a server-side rendering mock and device simulation capabilities. These allow for the manual override of device settings via properties or context to ensure consistent rendering during server-side operations and to facilitate automated UI testing. The project covers device characteristic detection and v

Ant Design Mobile is a mobile UI component library and design system built for React. It provides a collection of pre-styled interface elements and standardized UI blocks used to create consistent, responsive user interfaces for mobile web applications. The framework focuses on mobile web design and frontend interface engineering, providing tools to implement interaction patterns tailored for touch-based browsing. It ensures a uniform look and feel across different mobile browsers and handheld device screens. The library incorporates responsive layout systems and CSS-variable-based theming.

This is a responsive website theme for Hugo, providing a minimalist static site template and markdown blog layout. It is designed to prioritize content readability and search engine optimization through a clean, mobile-friendly interface. The theme distinguishes itself with built-in support for light and dark mode switching and a client-side search integration that allows users to query site content without a backend server. It also includes a comprehensive suite of social integration tools for managing OpenGraph and Twitter Card metadata. The project covers broad capability areas including

Elementor is a visual page builder for WordPress that provides a drag-and-drop interface for creating responsive layouts and custom themes. It functions as a comprehensive design system manager and theme builder, allowing for the creation of global website components such as headers, footers, and archive pages without writing code. The platform distinguishes itself through a dedicated popup builder with custom trigger conditions and a visual landing page creator that utilizes pre-made kits. It includes a global style registry to synchronize fonts and colors across all site elements and a widg

This project is a web development educational resource and HTML5 learning repository. It serves as a front-end markup guide containing a collection of source code and practical examples designed to teach the fundamentals of web design. The repository covers an HTML and CSS learning path focused on frontend web development and web layout implementation. It provides reference materials for mastering responsive web design and the application of structural patterns to create functional web pages. The materials demonstrate the use of semantic HTML structure and responsive meta viewports. The tech

mvp is a classless CSS framework and minimalist library that applies default visual styles directly to standard HTML elements. It provides a customizable theme designed to create clean pages and polished interfaces without requiring the use of CSS classes. The system uses centralized CSS variables to manage global UI customization, allowing colors and fonts to be updated across the entire interface from a single location. This approach supports a rapid prototyping workflow for developing proofs of concept. The library covers the styling of standard HTML elements, including form controls, typ

Element Plus is a Vue.js UI component library and enterprise web design system used for building professional web applications with Vue.js 3. It provides a comprehensive set of pre-styled interactive components and tools designed for creating responsive user interfaces. The project includes a customizable component theme system for managing global CSS variables and dark mode palettes. It also features a Vue.js migration toolkit with automated transpilation tools to convert legacy UI code to current component standards. The library covers a wide range of capability areas, including high-perfo

Vuestic Admin is a Vue 3 administration dashboard template and framework designed for building back-office applications and internal management consoles. It provides a ready-to-use foundation that integrates Vite, Pinia, and Tailwind CSS to accelerate the development of administrative interfaces. The project features a themed UI management system with a central configuration engine for global styles and branding, including a toggleable dark mode. It also includes a mocked API development environment that intercepts network requests and provides static data stubs for interface testing and rapi

Ariakit is a headless component library and accessible UI component toolkit. It provides a set of unstyled web components with built-in accessibility patterns to ensure that screen readers and keyboard navigation function correctly. The project includes an adaptive color engine that calculates high-contrast text and dynamic surface colors for light and dark modes. It also features a concentric layout engine for computing nested padding, margins, and border radii for circular interface elements, alongside a design token system for managing global CSS variables. The toolkit covers broad capabi

hint.css is a pure CSS tooltip library and styling framework used to create accessible informational pop-ups. It functions as a lightweight user interface component that transforms ARIA attributes into visible tooltips without the use of JavaScript. The framework is designed to be customizable, offering a system of configurable class prefixes to prevent naming conflicts within larger web projects. It utilizes a BEM-inspired namespace to ensure stylesheets remain conflict-free when integrated into existing environments. The library covers a range of UI capabilities, including directional posi

Open Props is a CSS custom property library and design token set providing reusable variables for colors, typography, and layout. It functions as a CSS variable framework and design system intended to ensure visual consistency across components and platforms. The project includes an optimization toolkit for generating selector-scoped variable bundles and removing unused design tokens from stylesheets to reduce final file size. It also provides configuration files to enable design variable autocompletion within code editors. The system covers broader capabilities in adaptive web interface des

Magic of CSS is a structured tutorial series that teaches web developers advanced CSS layout, typography, and animation techniques through hands-on examples. The course covers the full spectrum of CSS capabilities, from foundational box model and positioning concepts to sophisticated animation and interactive state management, all without relying on JavaScript. The series distinguishes itself by teaching practical, real-world CSS patterns such as inline-block justified grids, percentage-based absolute positioning, table-display vertical centering, and letter-span styling techniques. It demons

vCard Personal Portfolio is a static HTML and CSS template that provides developers with a ready-to-deploy personal portfolio website. It is built as a frontend portfolio template, delivering a responsive portfolio website that showcases a developer's projects and skills in a layout optimized for all screen sizes. The project employs a mobile-first design approach, where styles are authored for mobile viewports as the baseline and then enhanced for larger screens using progressive min-width media queries. Its CSS-grid-based responsive layout arranges page sections using CSS Grid with flexible

huashu-design is a design system infrastructure and a set of specialized design engines for high-fidelity HTML prototyping, quality evaluation, and presentation conversion. It provides tools for generating interactive single-file HTML mockups, frame-based motion design, and a visual evaluator that analyzes design quality across five dimensions using radar charts. The system distinguishes itself through a translation pipeline that converts HTML slide decks into editable PowerPoint and PDF objects rather than flat images. It includes a motion design engine that uses a time-slice model to render

This project is a React-based administrative template and UI kit designed for building dashboards. It provides a comprehensive collection of pre-styled layouts, an accessible component library, and a Sass-based UI framework for creating administrative interfaces. The template is specifically structured as an AI-optimized project, utilizing coding patterns and organization designed to help AI assistants generate consistent, production-ready React code. It features a flexible styling system using Sass variables and CSS custom properties to support customizable light and dark themes. The kit co

This is a developer portfolio site built with Gatsby, designed as a single-page website to showcase a developer's projects, experience, and personal brand. The site is powered by Gatsby's static site generator, which uses a GraphQL data layer and file-based routing to produce an optimized static build for deployment on any static hosting service. The visual theme is controlled entirely through CSS custom properties, with a centralized set of variables for navy, slate, and accent colors that can be edited to customize the site's appearance. The user interface is constructed from reusable React

Choices is a vanilla JavaScript library used to create customizable select boxes and text inputs without external dependencies. It functions as a custom select box plugin that transforms standard HTML select elements into searchable, stylable dropdowns and tagged text input components. The library distinguishes itself through a system of customizable HTML templates and CSS custom properties, allowing for the creation of tailored UI components. It provides the ability to define custom HTML structures for input components and modify the visual appearance of the interface via CSS theme styling.

Grade is a JavaScript library for image color analysis and dynamic theme generation. It extracts the most prominent colors from an image to automatically generate complementary CSS gradients and coordinated color palettes for web interfaces. The tool identifies dominant colors using pixel-data analysis and applies mathematical offsets to determine matching hues. It can inject these calculated values directly into the document as CSS custom properties or export the gradient data as a raw array for custom visual implementation.

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