Android Pick: Deliveries Package Tracker
Duncan Jeffrey's pick on This Week in Google 373 is the Deliveries Package Tracker app. This can keep track of all of your parcels in one place. Just add the tracking ID and find out where your package is. The app will notify you when there is an updated shipping status, and there's a widget that you can add to your home screen. It will sync your deliveries across all of your devices as well.
Deliveries is free, but there's a pro version for $0.99 that will remove all ads, easily import Amazon and eBay orders, get different themes, a quiet mode for notifications, and more.