I have been using Email Extractor to supplement my email prospecting activities. I dont like it as much as Email Grabber but sometimes I do find it works better. Recently I tried finding emails of college career services personnel. It did a better (and faster) job at gathering them than Email grabber did.
I told it to search google with the following keywords: career services or career placement
That particular phrase on google brings up mostly edu website which is what i want. The software then extracts them with ease. Its taken about 1.5 hours to get 1,000 of them.
http://emailextractorpro.com/
