The following information is adapted from pages written by Bernie Dodge and come from the WebQuest Training Materials at http://edweb.sdsu.edu/webquest/webquest.html 

There are many specialized search engines on the WWW, as can be seen at AllSearchEngines.com. The list below is a selective subset of these, chosen because they might help you find materials useful as resources in a WebQuest. All of these links lead to sites that contain specific information that may not turn up when you do a general search of the Web using other search engines and directories.