This is a port of the CristalX theme by Nuvio | Webdesign from oswd.org. This theme is fixed width, it only supports the right sidebar and the contents of the left sidebar will be applied to the right. I'm currently using an adaptation of this theme on my personal website.
List of features:
Standards-compliant XHTML 1.0 Strict and CSS.
CSS layout (tableless).
Cross browser compatible. Tested with Firefox 2, IE6, Konqueror and Opera 9.