From Email Extractor Enterprises:
WebExtract is a fast email extractor designed to find both targeted and untargeted email addresses from websites. It can find emails from specific areas of interest or countries of your choice. You can easily add thousands of keywords for WebExtract to process. If you would add a keyword such as "real estate" then WebExtract will spider websites related to that keyword and extract the email addresses. It will do it as quickly as your connection allows it to, and when it's done it moves on to the next keyword in the list until there is nothing left to do. You can even set it to only visit websites and harvest emails from a certain country or domain.