USPS Informed Delivery - Get an image of your mail before it arrives
PackageX Receive - PackageX Receive digitizes package-receiving operations and delivers world-class package management solutions.
Amazon Logistics - Create your own delivery business. Amazon's UPS competitor.
DelivApp - Software for managing online ordering, delivery and loyalty for multi-unit restaurants
Yazz - On demand delivery
AfterShip - AfterShip is the shipment tracking API for ecommerce businesses and marketplaces.