Netcraft
From Wikipedia, the free encyclopedia
Netcraft is an Internet monitoring company based in Bath, England (recently having relocated from Bradford on Avon).
They monitor uptimes and provide server market-share analysis including web server and operating system detection. They also provide security testing and publish news about the state of various networks that make up the Internet. In the late month of October 2006, Netcraft identified 100 million Web sites with domain names and content on them, with 47 to 48 percent of that representing active sites.