Google: It is widely used search engine around the globe and stands second position in global ranking. It got lots of free services like free email accounts, groups, searching etc.
Facebook: It is one of the well popular social networking sites leaving behind all other social networking site. It was in 3rd position but now Facebook did it. Facebook manage to gain top position in terms of globing ranking.
You-tube: The world’s largest video sharing site is You-tube. From couple of years it stands on 3rd position.
Yahoo: It is the second largest search engine just behind the Google. In global ranking it is in 4th position. The site was founded by Jerry Yang and David Filo.
Baidu: It is the Chinese search engine stands in 5th position in global ranking. 98% of visitors are from china because it works in Chinese language.
Wikipedia: It was launched in the year 2001 January 15th and it is the widely used encyclopedia across the globe.
Windows Live: It was launched in the year 2005 November 1st. This website was preferred by most of the European people.
Twitter: It is social networking site started in the year 2006 July 15th. It ranks 8th in terms of global ranking.
QQ.COM: It is also a Chinese free instant messaging computer program. The backlink is about 508,400.
Amazon: It is an online marketing company and this site was founded by 1994 by Jeff Bezos.