rockstone.co.uk
Rockstone are a company specialising is networks and firewalls. This website was built in less than a week in order for the company to show it at a product convention.
Rockstone's products are primarily Unix-based so the site had to work on Unix as well as Windows and MacOS. The best way to accomplish this within the time frame was to code the site so that it validated with the W3C specifications.
Although the site has no server-side coding it's content is controlled with XHTML with CSS used to control layout.