Social Share Plugin allows you to add google, facebook,twitter and linked in buttons in posts.
This lets you have an integrated site without a lot of coding,and still letting you customize it exactly the way you’d like.
First, activate and set up the base plugin, which makes your site haveall social functionality.
Unlike other social plugins for wordpress, this one helps you add all social buttons in posts.
Requires WordPress 3.0 and PHP 5.