ADDRESS FINDER -- "Internet Address Finder (IAF) is the easiest and most comprehensive e-mail white pages on the Internet. By using IAF, you agree to the IAF Use Agreement. Help us build IAF - add a listing today!"
FOUR11 DIRECTORY -- "Internet's largest white page directory with over 6.5 Million listings. The best way to search for someone's e-mail address or Web page." NOTE: "LookUP! and Four11 Have Merged!"
OKRA -- Will help you find email addresses of your friends, organizations and even your dog (if it uses the net..) Essentially, there are two functions provided, submitting a query, and performing and add/delete from the database. Primary differences between this database and most others are that we do not require any registration for using our service, our data comes from a variety of differing sources, and of course, we're just college kids.
WHOWHERE? -- List yourself, find others. "The largest Internet directory of email addresses from around the world..."