TrackThis: Track UPS/Fedex/USPS/DHL Packages by Email, SMS, Twitter or Facebook
http://www.usetrackthis.com/

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Track Your Packages Over Email, Text message, Facebook or Twitter No more refreshing pages. No more wondering if packages have arrived yet. With TrackThis, we'll send you near instant updates via Email, SMS messaging, RSS feeds, Facebook, or Twitter. We track UPS, Fedex, USPS, DHL and several other carriers.

Packagetrackr is an all-in-one tracking tool for all your shipments. Packagetrackr will remember all of your tracking numbers and pull delivery status information from a dozen carriers with extra features not offered on the carriers' sites.

Universal Package Tracking Service

Track any order. This site figures out the carrier

RASTREAR PAQUETES DE UPS, FEDEX Y DHL

Buscador de paquetes y su hubicacion

universal package tracking: UPS, FedEx, USPS, and DHL with RSS and Maps