Social services are everywhere and integrating them into your website is the fastest and easiest way to boost exposure. Here is a list of great tools that allow you to track user interactions on your website.
Addthis offers great analytic tools to track the social presence of your website.
Similar to Addthis, Sharethis also lets you integrate a number of social services and allows you to track social interactions on your website.
3. AddtoAny (Lockerz Share)
AddtoAny is another service but lacks the analytic capabilities of Addthis and Sharethis.