Yet another of these social networking sites. But this time, with analytics in mind. Firstly, it allows you visitors to share content with others, though a web widget in your site. They support and help monitor many of the popular social media sites on there like Facebook, Twitter, Digg, Stumbleupon and so on. The purpose of this widget is to tell you how and which content of your site is being shared and by who. This way you can use the information to further improve your site. AddThis is installed on over 7 million domains, which means that it is gathering a lot of data on traffic and visitors' behaviour and interest. They support over 50 languages, which means it can work on numerous websites even cross the globe. Try it out.