Octopi - Powerful Pacman (GUI | frontend) written in Qt
USPS Informed Delivery - Get an image of your mail before it arrives
Parcel Perform - Parcel Perform is a global e-commerce parcel tracking software with over 600+ logistics carriers...
PackageX - PackageX is a modern logistics platform.
17track - All-in-one package tracking
Deliveries - Deliveries lets you track of all your packages in one place