All About Search Indexing Robots and Spiders
Search Tools explains how the search engine programs called "robots" or "spiders" work, and reviews related sites.
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Http User Agent Index
An alphabetical list of user agents and the deployer behind them.
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List of Robot Agent Strings
A list of Web robots with the identifying data they leave in Web site logs.
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Psychedelix List of User-Agents
Large list of search engine spiders, similar Web robots, and Web browsers: their web-log identification and links to their originators.
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Robots, Spiders and Other User Agents: a Resource for WebMasters
Searchable database of robots, spiders and other user agents for programs that surf the web.
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Robots.txt Syntax Checker
Online tool for syntax verification to robots.txt files.
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Search Engine IP Addresses
Lists IP addresses of search engine spiders. Can be searched by IP address. Also links to resources on spiders.
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Spiders, Crawlers and Indexers Database
Searchable database of information on Web robots: name, useragent, status, description, and owner's name URL and email address.
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The User-Agent Database
A list of spiders (robots or crawlers), browsers and harvesters, sorted into a searchable database.
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The Web Robots Pages
FAQs about the programmes that index the Web, how to direct visiting robots, a database of robots, an archived mailing list, background reading, and related links.
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