I am not sure if this site been mentioned here yet, but I just came across it yesterday.
A friend of mine recommended I check how many other domains are hosted on the same server where our website is located. He had pointed me to http://www.whois.sc.
I had tried their “Search Domain Suggestions” tool, and was pleasantly surprised by the amount of information available.
You can get title, meta tag, dmoz, yahoo and of course the domain registrar information in a matter of seconds in one place.
Disclaimer:)I have no affiliation with this site.