BotSeer is a Web-based information system and search tool that provides resources and services for research on Web robots and trends in Robot Exclusion Protocol deployment and adherence. More at Wikipedia
Robots Exclusion Standard - The Robot Exclusion Standard, also known as the Robots Exclusion Protocol or robots.txt protocol, is a convention to prevent cooperating web spiders and other web robots from accessi...
Web Crawlers - A Web crawler is a computer program that browses the World Wide Web in a methodical, automated manner or in an orderly fashion.