WonderWebWare TemplateShaker is a wonderful tool to customize the xhtml or css templates.
This simple user friendly tool can be used to generate xhtml or css templates in the WYSIWYG interface. The simple interface of the tool allows you to easily customize the templates with just a single click. In a WYSIWYG interface customize the feel and look of the templates and save it comfortably. Other than that these templates generated can be accessed with your favorite html editor and can be used with your sites. With the help of this tool the web designers get an on-the-fly way to quickly and easily modify the look of predefined template layouts. Further the tool can be used to; change the images, backgrounds, text colors, page background, produce hundreds of templates in the first version, and so on.
This free to use tool for both commercial as well as non-commercial users generates free to use template under the Creative Commons license.