OneTracker - OneTracker – Package Tracker is an app by OneTracker Team that helps users track all their delivery vehicles and staff to increase the productivity of their delivery business.

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

AfterShip - AfterShip is the shipment tracking API for ecommerce businesses and marketplaces.

mlist - Email newsletters, outside of the inbox

Track24 - Track24 app assists you in tracking the packages of more than 600 international courier and postal services from all around the globe.

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