This list of social sharing plugins for WordPress is being updated for the best plugins in 2014.
SexyBookmarks by shareaholic adds an attractive social bookmarking menu to your posts, pages, index, or any combination of the three. You can see this plugin in action at the bottom of this post!
SexyBookmarks also adds the ability to increase reader engagement and page views by highlighting related content from across your site.
Sharebar adds a dynamic and fully customizable vertical box to the left of a blog post that contains links/buttons to popular social networking sites.
Help people share, bookmark, and email your posts & pages using any service, such as Facebook, Twitter, Google, StumbleUpon, LinkedIn and much more.
The WordPress plugin to help people share, bookmark, and email your posts and pages using any service, such as Facebook, Twitter, StumbleUpon, Google, Digg, Delicious, and well over 100 more sharing and social bookmarking sites. New: Pinterest Pin It Button in addition to the Facebook Like Button, Twitter Tweet Button, Google+ Share Button and Google +1 Button.
This sharing plugin comes with a customizable Smart Menu, which places the services visitors use at the top of the menu, based on each visitor's browsing and usage history.
Slick Social Share Buttons
Slick social share buttons add facebook, twitter, Google +1, Linkedin, Digg, Delicious, Reddit, StumbleUpon, buffer and Pinterest pin it social media.
Add Facebook, Twitter, Google +1, Linkedin, Digg, Delicious, Reddit, buffer, StumbleUpon and Pinterest pin it social media buttons to your website in either a floating or sliding panel and see summaries of all your social metrics in the admin social statistics page.