I feel like last year when Moz was still SEOMoz I used a beta tool that would help you build a bunch of queries for link prospecting. You would tell it what your sites about and a few other pieces of information, and it would give you a list of google queries to get you started (ie inurl:directory <industryname> +"add site"</industryname>).
However, I'm having a hard time finding this tool, or any reference to it on the web. It's also possible that it wasn't a moz tool but I'm misremembering where I found it. Does anybody have any idea what I'm talking about?