Digg Digg is one of the most popular sharing plugins for WordPress blogs with over 330,000 downloads to date. It adds a nice floating bar to your blog. It also gives you lots of other options to add sharing buttons to your site. Download the plugin here: Digg Digg by Buffer
Digg Digg provides a floating social sharing widget that’s similar in style to Mashable’s (the sharing bar floats to the left of your blog post and follows the user).
To add the latest social services like Pinterest or Google+ it’s as easy as checking a box in the WordPress plugin settings and then you’re off to the races. I’ve set up social sharing icons manually and using many different plugins and services and I like this one best for its ease of implementation and excellent design. Here’s an example on a post of mine on LocalNa8ion.com