Polymail - Native email app for email productivity.
Hop - Spike makes working easier and more efficient. Saving you and your team time, sanity, and a lot of headaches.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
Funnster - The best way to get together with your friends and family
Morning Mail - A new way to manage your mail. Tinder for email.
The Nudge - A planner friend in your pocket.