Nathan Smith introduced his 960 Grid System:
As you might have heard, I recently launched a site for the templates that I created to use in my personal and professional projects. For lack of a better name, and because the numerals made for a nice logo, I’ve decided to simply refer to it as the 960 Grid System.
View Site 960 Grid System
Symphony is a web publishing application built in PHP and MySQL for building sites using web standards: CSS, XHTML, XML and XSLT. Symphony has been developed by Twentyone Degree in Brisbane, Australia. It fills a niche between open source blogging applications and enterprise content management systems and frameworks.
View Site Symphony Showcase