United States  :http://www.usps.com 
United Kingdom:   http://www.parcelforce.com/
Canada :   http://www.canadapost.ca

France:http://www.chronopost.fr/transport-express/livraison-colis

http://www.ems.com.cn/jsp/track/ttq/e-cha-xun-lian-jie.html (for all country)