Facebook is a social networking site developed by Mark Zucherberg in January 2004. It is popular for inviting friends, uploading pictures, and especially using applications. As of 2010, Facebook has reached over 85 countries and their respective languages, English, Chinese and the like.
Facebook apps weren't as popular in the years 2004-07. In 2008, Facebook apps became increasingly popular when micropayment social gaming companies like Playfish, has introduced one of the most interactive games known as the beta artillery, turn-based game called Crazy Planets.