W3Schools is a web developers portal, with tutorials and references of many different web development subjects, including HTML and JavaScript to name a few. W3Schools is completely free to the user, and is funded through the advertising by its sponsors . However, the tutorials themselves and the code provided are proprietary and may not be distributed without the written consent of Refsnes Data.

W3Schools is intended for use by beginning and expert web developers alike. It is created by Refsnes Data, a Norwegian family-owned software development and consulting company, consisting of father Jan Egil Refsnes, daughter Hege Refsnes and son Ståle Refsnes.

Features

Web Development Tutorials (e.g. HTML, CSS, RSS, etc.)

References - e.g. HTML Entities, HTML Colors, etc.

Quizzes (HTML, XHTML, etc.), answers to that can be found in tutorials.

W3Schools Certifications for HTML, XML and ASP.

An on-site HTML editor with HTML examples for experimenting with.

W3Schools Tutorials

The tutorials provide only an introduction to the topic in question, although they are easy to read and understand.

W3Schools provides tutorials on the following web development subjects:

(X)HTML and CSS

XML

AJAX

Browser Scripting

Server Scripting

Microsoft .NET

Multimedia

Web Building

Browser usage statistics