I am glad to announce about “XHTML Fundamentals” new course available for free at www.abelski.com. XHTML, the XML based version of HTML, is a cleaner and stricter variation of HTML. It allows developing XML documents browsable by web browsers both on desktops and on mobile telephones. This course introduces the differences between XHTML and HTML and overviews XHTML important elements. This course is available for free at www.abelski.com. Registration is required in order to take this course. The registration is free.