The Harvester
By: The_Eccentric
theHarvester is a great open source intelligence tool (OSINT) for getting emails and user names from public sources such as Google or Linkedin.
It would have took to much editing to do it all over again , so i just link you to my site where its at
http://seunited.wordpress.com/2010/04/09/tool-write-up-for-the-framework/ its worth the navigating to the link
Let me know what you think