Bigfoot
An e-mail-address finder, Bigfoot features a simple interface, security features, and an aliasing feature that lets you keep a stable e-mail address regardless of your service provider.
Four11
With e-mail and telephone-number searching, and useful filter options like specifying the name of a high school or college, Four11 is the most comprehensive and impressive people finder on the Net.
InfoSpace
InfoSpace offers yelllow pages, directories of businesses and people, and links to a lot more federal, state and city government directories.
Internet Address Finder
Although IAF is especially strong at finding university e-mail address, as well as the addresses of AOL and CompuServe subscribers, it does lack some of the more advanced search-filter options of its competitors.
Switchboard
This telephone-number and mailing-address finder boasts volume, but with only city and state filter options, you might be sifting through a bunch of returns.
WhoWhere
Featuring an impressive collection of personal home pages and security features, this e-mail-address, telephone-number, and mailing-address finder is hampered by a lack of flexible filter tools.