This method will show you the websites linking to your competitors domain/domains where you can post your own links!
Just type this into the google keyword tool exactly.
or type this
It will bring up websites where your competitors websites are listed specifically by .edu .gov or anyother .something site.
Simplified combination of google's commands.
So if you're using market samurai, or keyword elite, something that shows you how many .gov or .edu sites are linking to a webpage, you can instantly find out what they are so you can get your own.