Full Stack Open is a comprehensive, free online course designed to teach modern web development using the latest technologies, such as React, Node.js, GraphQL, and TypeScript. The course is offered by the University of Helsinki and is aimed at both beginners and experienced developers.

The Odin Project offers a comprehensive and free curriculum designed to take beginners from having no coding experience to becoming full-stack web developers. With a focus on practical, hands-on learning, the platform provides structured courses on HTML, CSS, JavaScript, Ruby on Rails, and more.

MDN Web Docs, available at developer.mozilla.org, is a leading platform for web developers, providing extensive documentation, tutorials, and reference guides on a wide range of web technologies, including HTML, CSS, and JavaScript. Maintained by Mozilla, MDN is an invaluable resource for developers of all levels, offering up-to-date information and practical examples to help them build and optimise websites and web applications.

GitHub is a widely-used platform that facilitates software development and collaboration by providing tools for version control, code hosting, and project management. Developers and teams can store their code, track changes, collaborate on projects, and manage software development workflows using GitHub.

W3Schools is a widely-used online platform that offers tutorials, references, and examples for a range of web development languages, including HTML, CSS, JavaScript, PHP, Python, and SQL. Designed to be accessible for beginners and useful for experienced developers, W3Schools provides interactive coding exercises, quizzes, and certification programs that help users learn and practice coding in a hands-on manner.

freeCodeCamp is an accessible, non-profit online platform that provides free, in-depth coding education. It offers a broad range of interactive lessons and projects designed to teach users how to code and develop practical skills in web development, data analysis, and more.

Codecademy is a leading online learning platform designed to teach programming and coding skills in an interactive and engaging way. With a wide range of courses covering various programming languages and technologies, Codecademy makes coding accessible to everyone, whether you're just starting out or looking to expand your skills.