TL;DR Email - Send short emails & read emails as fast as you read Facebook
Out of the Ordinary Emails - Exceptional newsletters about creative obsessions
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Snack - Read all your favorite email subscriptions in one app
mlist - Email newsletters, outside of the inbox
Inside.com - Real news, curated by real humans