Cardhop - The Mac contacts app you'll want to use.
Polymail - Native email app for email productivity.
about.me - About.me lets you quickly build simple and visually elegant splash pages that points visitors to your content from around the web. Get started today.
Airmail for iOS - One of the best Mac email clients, now on iPhone
ContactRescue - Magically get your address book up-to-date and accurate
Morning Mail - A new way to manage your mail. Tinder for email.