MailDump Verifier - Powerful Emails Verifying Tool that helps verify email address or validate email addresses
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Find Email Address - Highly Accurate Email Finder and Verifier
Drupe - Next generation contact manager and dialer.
Mail Dump - Powerful Extensions for email addresses extracting, verifying and finding
Simple Contacts - Contact lens prescriptions from home