Email

1. Email-Search.org: A mini-portal with a number of tools for searching email addresses. Find current, former email addresses, extract them from the web.
2. Nicado: Free to register, Search email addresses. The Nicado search engine allows registered users to search the Nicado database using an email address or telephone number.
3. TEK search engine: is an email-based search engine developed at the Massachusetts Institute of Technology. The search engine enables users to search the Web using only email. It is intended to be used by people with low internet connectivity.