Sass

Bootstraptwbs/bootstrap

The most popular HTML, CSS, and JavaScript framework for building responsive, mobile-first websites.

Bulmajgthms/bulma

A modern CSS framework based on Flexbox, providing responsive design components without JavaScript.

vuetifyvuetifyjs/vuetify

A Vue UI component library with Material Design implementation and comprehensive component set.

Slatelord/slate

A static API documentation generator that creates beautiful, responsive documentation sites from Markdown files.

Slateslatedocs/slate

A static API documentation generator that creates beautiful, responsive documentation sites from Markdown files.

Hackathon Startersahat/hackathon-starter

A comprehensive Node.js boilerplate for web applications with authentication, API integrations, and AI examples.

Foundation for Siteszurb/foundation-sites

A responsive front-end framework for building prototypes and production sites that work on any device.

Web Starter Kitgoogle/web-starter-kit

An opinionated boilerplate and workflow for building high-performance, multi-device websites with modern tooling.

Lichessornicar/lila

A forever free, adless, and open-source chess server focused on realtime gameplay and ease of use.

Material-components-webmaterial-components/material-components-web

Modular and customizable Material Design UI components for the web, developed by Google.

BootstrapVuebootstrap-vue/bootstrap-vue

BootstrapVue provides Vue.js components and directives for building responsive web interfaces with Bootstrap 4.

Bootstrap-sasstwbs/bootstrap-sass

Official Sass port of Bootstrap 3, providing all its styles, components, and JavaScript as Sass files for easy integration.

Country Iconslipis/flag-icon-css

A curated collection of all country flags in SVG format with CSS for easy web integration.

Magnific-Popupdimsemenov/Magnific-Popup

A fast, lightweight, and responsive lightbox plugin for jQuery and Zepto.js with a focus on performance.

Leptonhackjutsu/Lepton

A lean, cross-platform desktop app for managing code snippets using GitHub Gist.

carboncarbon-design-system/carbon

An open-source design system by IBM providing components, styles, and tools for building consistent user interfaces.

Bourbonthoughtbot/bourbon

A lightweight, dependency-free library of Sass mixins and functions for efficient stylesheet authoring.

react-visuber-common/react-vis

A composable React visualization library for building common charts like line, bar, scatter, heat maps, and more.

react-big-calendarjquense/react-big-calendar

A flexible React calendar component for displaying events, inspired by Google Calendar and Outlook.

hint.csschinchang/hint.css

A pure CSS library for creating accessible, customizable tooltips using ARIA attributes and pseudo-elements.

Foundation for Emailszurb/foundation-emails

A framework for creating responsive HTML emails that work across all email clients, including Outlook.

dat.GUIdataarts/dat.gui

A lightweight graphical user interface for changing variables in JavaScript.

Glide.jsjedrzejchalubek/glidejs

A dependency-free JavaScript ES6 slider and carousel that's lightweight, flexible, and fast.

notiejaredreich/notie

A dependency-free JavaScript suite for clean notifications, user input dialogs, and selection interfaces.

Countlycountly/countly-server

A privacy-first, AI-powered analytics and engagement platform for mobile, web, desktop, and IoT applications.

angular-electronmaximegris/angular-electron

A starter template for building cross-platform desktop applications with Angular and Electron.

Buttonsalexwolfe/Buttons

A highly customizable, production-ready CSS button library built with Sass for mobile web and desktop.

epochepochjs/epoch

A JavaScript charting library for creating historical reports and real-time timeseries visualizations.

muimuicss/mui

A lightweight CSS framework that implements Google's Material Design guidelines with minimal footprint.

Retina.jsimulus/retinajs

JavaScript and CSS preprocessor helpers for serving high-resolution images to retina and high-DPI displays.

ng-adminmarmelab/ng-admin

Add an AngularJS admin GUI to any RESTful API with datagrids, filters, forms, and dashboards.

Susyoddbird/susy

A design-agnostic Sass toolkit for building custom responsive grid layouts with pure functions.

scss-lintbrigade/scss-lint

A configurable Ruby tool for linting SCSS files to enforce clean and consistent code style.

Wavesfians/Waves

A Material Design-inspired click effect library for web interfaces.

Svelte Material UIhperrin/svelte-material-ui

A library of Svelte components implementing Google's Material Design guidelines.

algernonxyproto/algernon

A self-contained, pure-Go web server with built-in Lua scripting, multiple template engines, database backends, and support for HTTP/2, QUIC, and AI/LLM integration.