Improver - Improver Chrome extension helps you to find personal email addresses from social networks.

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.

SignalHire - Valid personal & work emails and phone numbers. Real-time verified contact info for recruiters, sales professionals, and marketeers.

Drupe - Next generation contact manager and dialer.

InFynd - Infynd is a leading b2b email database company that helps you find perfect customers and generate leads for the business. We provide potential customer data in your target market

Simple Contacts - Contact lens prescriptions from home