Document Archiver - Archive all your documents in a clean and consistent way

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

DocScan.io - Scan to email solution to archive your paper documents.

mlist - Email newsletters, outside of the inbox

mailfloss - Bulk email verification for busy businesses and email marketers. Put your email validation on autopilot. One-time, 60-second setup, no developers needed. Get your emails delivered to real people and maximize your email ROI.

TL;DR Email - Send short emails & read emails as fast as you read Facebook