Open-source alternatives to React95

98.css is a CSS retro UI framework and component library designed to recreate the visual aesthetic of legacy desktop operating systems. It serves as a retro design system and web UI emulator, providing a collection of styles to build faithful reproductions of vintage user interfaces. The framework employs a CSS-only component architecture to emulate classic software environments. It uses border-shadow emulation and state-based visual transitions to simulate physical button presses and three-dimensional panels without requiring external JavaScript logic. The library covers a wide range of int

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

Geist UI is a design system framework and React UI component library. It provides a collection of pre-styled, accessible components and design primitives used to maintain visual consistency across websites and applications. The framework includes a themed UI provider that manages application styles through a centralized system, enabling the switching of visual modes such as light and dark themes. It also features a responsive CSS grid system for organizing content into rows and columns that adapt to various screen sizes. The library covers accessible UI development using compliant markup and

This project is a design system component library and adaptive UI framework based on Adobe's Spectrum design system. It provides a collection of accessible React components designed to create consistent user experiences through a standardized set of adaptive and themeable interface elements. The framework features a responsive scale system that automatically optimizes touch targets and component sizing for mobile and desktop contexts. It is built as a tree-shakable library, allowing for the import of only the specific components used to minimize the final JavaScript and CSS bundle size. The

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

win11React is a web-based emulation of a modern desktop operating system environment built using React. It replicates the visual design, taskbar, and start menu of Windows 11 to create a browser-hosted workspace. The system features a customizable theme that allows users to apply custom backgrounds and styles to the workstation. Access to the environment is controlled through a simulated startup sequence and lock screen for session security management. The interface includes a desktop shell with draggable and resizable application windows and integrated system applications such as a terminal

Firefox-UI-Fix is a collection of CSS stylesheets, style overrides, and a UserChrome framework designed to redefine the layout and appearance of the Firefox web browser. It functions as a browser interface customizer and styling kit that uses CSS injection and DOM overrides to modify the browser shell. The project distinguishes itself by providing deep integration with host operating systems, allowing the browser's window decorations, menus, and themes to match system accent colors and native desktop aesthetics. It includes specialized capabilities for modifying the visual hierarchy of the in

Treat is a styling library that extracts CSS from JavaScript definitions during the build process to eliminate runtime overhead. It functions as a static style extraction tool, converting component-level style definitions into optimized, standalone CSS files. The framework is designed for building type-safe, themeable design systems that allow user interface components to adapt their appearance based on active design system settings. The library distinguishes itself by enabling complex style composition, including pseudo-selectors, media queries, and animations, within a unified object struct

Varlet is a Vue3 material design component library used to build mobile and desktop user interfaces. It provides a collection of standardized components based on Material Design 2 and 3 specifications. The framework functions as a cross-platform UI suite that adapts between mobile touch interactions and desktop environments. It includes a themable component system with customizable design variables and dark mode settings to align interfaces with specific branding. The library supports server-side rendering to improve initial page load speeds and search engine visibility. Additional capabilit

Nullboard is a local-first productivity tool and browser-based note organizer. It functions as a Kanban task board for tracking workflows and organizing tasks into draggable notes and lists within a minimalist interface. The project features a customizable Kanban UI that allows users to adjust visual preferences, including themes, font families, font sizes, and layout widths. The system manages data through local browser storage for offline access, supplemented by board file imports and exports and token-based remote synchronization for backups. It includes a revision-based undo system for

React Bootstrap is a frontend component framework and responsive UI kit that translates the Bootstrap CSS framework into a React-based component architecture. It provides a collection of reusable, pre-styled interface elements and grid systems designed for consistent, responsive web development. The library distinguishes itself by wrapping raw HTML markup in React components to manage accessibility and stateful behaviors. It utilizes a centralized theme provider to propagate global configuration and breakpoints, while employing portal-based rendering for overlays to prevent clipping issues.

kanagawa.nvim is a Lua-based colorscheme for NeoVim that provides a high-contrast visual theme based on a traditional Japanese art color palette. It functions as a comprehensive styling system for the editor, applying semantic syntax highlighting to code structures and plugins. The project features a system for switching between different lighting variants, such as warm, deep dark, and light modes. It includes utilities for customizing specific palette colors and highlight groups, as well as the ability to export color definitions to external terminal emulators and shells for cross-applicatio

This project is a collection of visual styles, layout variants, and color schemes for the Polybar status bar on Linux. It functions as a UI style coordinator that provides customizable status bar presets to modify the look and feel of a desktop environment. The system includes a dynamic color generator that creates matching color palettes based on wallpaper assets or random selections. This ensures visual consistency by synchronizing the colors of the status bar and application launchers with the desktop background. The project manages Linux desktop theming through the application of diverse

React is a JavaScript library for building user interfaces based on a component-driven architecture and unidirectional data flow.

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

nightfox.nvim is a customizable Lua-based color scheme for Neovim and Vim. It provides a comprehensive visual theme with dedicated support for language server protocols, Tree-sitter, and various editor plugins. The project distinguishes itself through accessibility features, using daltonization and color simulation to increase contrast for users with color vision deficiency. It also enables dynamic theme development via hot-reloading configuration state, allowing users to refresh the active color scheme without restarting the editor. The system includes programmatic color space conversion an

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

TWiLightMenu is a retro gaming frontend and game launcher for Nintendo DS hardware. It serves as a custom firmware tool and a unified interface for launching native games, emulated ROMs, and homebrew applications, while also functioning as a cheat manager and handheld storage manager. The project features a custom theme engine that allows for the personalization of the visual interface through custom images, fonts, and coordinate sets, as well as the use of custom boot splash screens and system audio. It distinguishes itself through a modular extension system that supports third-party plugins

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

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

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

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

Astrowind is a high-performance site framework and bootstrapping tool designed for building marketing sites, professional portfolios, and high-conversion landing pages. It utilizes a utility-first CSS architecture and a component-based UI library to assemble responsive websites. The project specializes in conversion rate optimization through targeted templates for lead generation, product sales, subscription captures, and pre-launch teasers. It includes specific infrastructure for static blogging, utilizing markdown-based content modeling and rendering for long-form articles. The framework c

YASB is a customizable status bar framework and desktop shell component for Windows. It provides a toolkit for building personalized information bars using a modular class-based widget architecture and CSS-based styling. The framework distinguishes itself through deep integration with Windows tiling window managers, allowing users to display active workspaces, tiling layouts, and window focus states. It also features automated visual consistency by generating system color schemes based on the current desktop wallpaper. The project covers a wide range of capabilities, including real-time syst

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

react-loading-skeleton is a React library for rendering placeholder shapes that simulate content loading states. It provides a collection of themed UI components used to represent loading interfaces before data is fetched and displayed. The library features a hierarchical theme provider that allows for the global or nested management of colors and animations. It includes customizable placeholders that support various dimensions and shapes, such as circular indicators for profile elements and block-level shapes for general content. The system implements accessibility standards by mapping comp

Framework7 is a mobile user interface framework and single-page application system designed to build responsive web applications with native iOS and Android appearances. It provides a comprehensive library of pre-styled components and a layout engine to create native-style user interfaces across multiple platforms. The framework utilizes a platform-aware theming system that adapts visual styles and color schemes based on detected device settings. It incorporates native mobile behaviors through a dedicated UI kit, including specialized interaction patterns such as pull-to-refresh and swipeable