WordPress Online

Product Description
The indispensable introductory reference guide to HTML, XHTML and CSSEven though new technologies enable people to do much more with the Web, in the end HTML, XHTML and CSS are still at the root of any Web site. The newest edition of this bestselling guide is fully updated and revised for the latest technology changes to the field, including HTML5 and CSS3. Illustrated in full color, this book provides beginner and advanced coders the tools they need to be proficien… More >>

HTML, XHTML & CSS For Dummies

Product Description
Just Enough Web Programming with XHTML, PHP, and MySQL provides a layperson’s guide to web programming for the casual web designer, student, or serious professional. The book explains how to build powerful interactive sites, whether you’re designing a bulletin board, game, or web store. As part of the Just Enough series, the book provides “just enough” information to get you started quickly, without overloading you with unnecessary details. After a brief introductio… More >>

Just Enough Web Programming with XHTML, PHP, and MySQL

htmlPlayground is a great online tool. It provides lots of XHTML and CSS reference by example. Now it’s a beta version.

It uses a lot of AJAX and JavaScript tech