Which application system has the best user centered design?

Application is the technological programme which we normally use in our daily life for example Microsoft word, Microsoft outlook, face-book, twitter, Hotmail, yahoo, hi-5 and many more. The applications is dynamic, programmer always upgrade their applications to make it better than others application. Programmers always change the function and design of the application. From those applications they earn huge name and fame.

For example, Facebook made Mark Zukenberg one of the successful idols. He made and broadcast his application in 2004, now in the present day he have over 1 billion of active users.

In my opinion the easiest application to use is Facebook. Because of that the users are increasing dramatically as compared to others. In this application the design is not so complicated. It will give the option one by one, and it’s in very simple language. The architecture of this application is quite easy as compared to other application. It provides multilingual options so, users can use in any language as they prefer. This application is written in C++ form. 

There are thousands of application which we can see these days, but because of the simplicity, and good architecture and design, the users of this particular application users growing steadily.