The website is no longer being updated, but it does provide maps about the internet and cyberspace. There is also a census of Internet use by country, artistic, conceptual and topological representations of cyberspace, traceroutes that data uses to progress through the internet, and maps of virtual worlds and multiple user dimensions.
Web Design References: Tools - Annotated collection of links to Web design tools, including HTML validators, link checkers, and tools for accessibility, color, CSS (cascading style sheets), information architecture, usability, and XML (extensible markup language). From Information Technology Systems and Services, University of Minnesota, Duluth.