E-mail directory that claims to be the "easiest, fastest, friendliest and most comprehensive people directory service on the Net."

yellow and white pages (germany)

Look up names and addresses of over 90 million names and 10 million businesses across the U.S.A. for free. One of the best.

In English, Spanish, or French, you can search for e-mail addresses, homepages, companies, and telephone numbers. Very powerful and accurate.