Especially useful is its HTML Validation Service . HTML Help by the Web Design Group . The CSS Pointers Group has information and links on Cascading Style Sheets. Webmaster resources also has much useful information on web publishing. Devhead of ZDNet has many useful utilities.
Unicode charts has all the unicode characters for letters in any language, symbols and signs.
Hopefully, some day they will all be supported by all browsers. Unicode and multilingual support in Web browsers and HTML . A clear explanation of the changes about to be brought in the web and our computers by the new standards of unicode. Lots of links to information on the subject and unicode and font software. A common sense guide to css.