Lini - Perform simple batch operations on Linkedin contacts
Hunter - Find all the email addresses related to a domain
SignWell - Make it so easy to sign your documents that it cuts turnaround time in half.
AnyMailFinder.com - Find anyone's email address
Grytics - Grytics is a SaaS solution for your Facebook Groups Analytics and Marketing
RocketReach - RocketReach allows you to lookup email and phone for 250+ million professionals.