There is a unique feature with Google. You can actually use it to search for data, which is online, for almost any country. Example Google URL for Poland: http://www.google.pl. Note instead of ending with .com, it ends with .pl. The end codes for all of the countries are listed on our Cyberspace Jargon page. It's a good way to do surname searchings in the ancestors' countries. 1-21-05
HistorySeek
A directory search engine specifically made for historians, genealogists, scholars and history enthusiasts.