Material UI

Material UI (MUI) is the most popular React component library, with over 95,000 GitHub stars and millions of weekly downloads. It provides a comprehensive set of styled, accessible, production-ready UI components that implement Google's Material Design system. From buttons and dialogs to complex data tables and navigation patterns, Material UI offers everything needed to build polished React applications with a consistent, recognizable design language.

The current major release, MUI 6, introduced design tokens, CSS theme variables, and improved support for dark mode and responsive breakpoints. The broader MUI ecosystem extends well beyond core components: MUI X provides advanced components like data grids, date pickers, and charts for enterprise use cases. Joy UI offers an alternative design system for teams that want MUI's developer experience without Material Design aesthetics. Base UI, a sibling project, strips away all styling to provide unstyled, headless components for teams that need full control over their design.

Material UI is well-documented with an extensive component reference, interactive examples, and theming guides. The project is actively maintained on GitHub with regular releases, a large contributor community, and commercial backing from MUI Inc. Its combination of design consistency, accessibility, and developer ergonomics has made it the default choice for React teams building Material Design interfaces.