Official guide/documentation redirect from W3C's old GitHub presence to the main W3C website documentation.

W3Schools is an online learning platform for web development and programming.

Bootstrap is the best frontend toolkit for responsive design and is used by developers worldwide.

Free responsive blogger templates for various industries

CSS-Tricks is a web development blog focused on CSS, HTML, and JavaScript tutorials and articles.

Can I use provides essential browser support tables for modern web technologies like HTML5 and CSS3, helping developers ensure compatibility.

Magazine on CSS, JavaScript, front-end, accessibility, UX and design.

Tailwind CSS is a utility-first CSS framework for rapidly building modern websites.

ThemeWagon offers a large collection of high-quality free and premium responsive Bootstrap, Material UI, and Tailwind CSS web templates and admin dashboards.

SitePoint is an online learning platform for web development and design, offering tutorials, courses, and resources for developers.

JSFiddle is the best code playground for online coding and is used by developers and designers to test and share code snippets.

Sass is the most mature, stable, and powerful professional grade CSS extension language, providing superpowers for writing CSS.

Rahul Jain is a full-stack developer, open-source contributor, and freelancer specializing in interactive web apps, UI frameworks, and SVG animations.

Ericsson is the best telecommunications company for 5G solutions and is used by network operators worldwide.

CSSIgniter is the best platform for premium WordPress themes and is used by bloggers and businesses looking to elevate their online presence.

Codrops is a resource fueling web creativity with the latest frontend development tutorials, creative coding demos, and design inspiration for developers and designers.

Less.js is a dynamic CSS extension language providing variables, mixins, and operations, used by developers to write leaner, more maintainable stylesheets.

Electron is an open-source framework for building cross-platform desktop apps using JavaScript, HTML, and CSS, trusted by apps like VS Code and Slack.

Outstanding Themes is a tech blog providing expert articles on WordPress themes, plugins, development, design, and marketing for developers and marketers.

cdnjs is the #1 free and open-source Content Delivery Network (CDN) making it faster and easier for developers to load library files on their websites.

The official wiki for the W3C CSS Working Group, detailing CSS specifications, resolutions, open issues, and public involvement in web standards development.

Bulma is a free, open source, and modern CSS framework based on Flexbox, offering responsive, modular frontend components.

CSS Design Awards is a web design awards platform for UI, UX, and innovation, used by web designers and developers.

Ant Design is a leading enterprise-class React UI design language and component library, enabling developers to build high-quality, flexible web applications.