ContactRescue - Magically get your address book up-to-date and accurate
Polymail - Native email app for email productivity.
Wall Of Me - Wall of me: all your favorite socials in a single place.
Airmail for iOS - One of the best Mac email clients, now on iPhone
Clearbit Connect - Clearbit Connect is a free extension that surfaces actionable information on the people who email you.
Morning Mail - A new way to manage your mail. Tinder for email.