InboxVudu - Spend 90% less time on e-mail.
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
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
mlist - Email newsletters, outside of the inbox
Mailbutler - Mailbutler adds lacking functionality to email clients and increases your productivity
TL;DR Email - Send short emails & read emails as fast as you read Facebook