DMitry
Purpose:
DMitry, the Deep Magic Information Gathering Tool (with the mysterious acronym), performs a whole stack of tests that you could do yourself, but might prefer to automate. Given an IP address it can do an Internet Number whois; given a hostname or domain name it can do a whois. Add a Netcraft.com query, a search-engine powered subdomain search, an email address search and a basic port scan, and you can perform deep research with a one-line command.
Note that this comes at a cost in processor time. DMitry can provoke a segmentation fault, among other issues. Thus it might be handy to run on someone else’s machine, somewhere, somehow, out it cyberspace.
Output can be saved to a file, which makes this a handy tool to fire off and come back to later.
Stage:
Information Gathering
Man Page:
There is a very nice man page with examples at http://linux.die.net/man/1/dmitry.