Search engines to uncover relevant information

Domain Tools is a set of domain name search engines that will help you uncover relevant information about certain domain names. They have a "Whois" search that reveals records about the party who registered the domain, a "Suggestions" search to help you find similar domain names, a "Domain Search" which shows you what TLDs of a domain name are available, and domain names that are "For Sale" or "At Auction".

http://www.domaintools.com/