A decade back no one would have thought even in their wildest dreams that a social networking site like Facebook will flourish and boast of the 3rd largest population (registered users) in the world . But today right from promotion to hiring is done of Facebook . And social media promotion has attained an important position in a product promotion. There are more that 550,000 active Facebook application according to the social network , Among these many apps have been designed to integrate the company's operation with the Facebook. And the best part is most of them are free. Here is the list of best Facebook application for your business.