Socialgrid
Socialgrid  Homepage →
SocialGrid is a simple widget that makes it easy to  add and organize links to your various profiles on the internet.
It  currently supports the following services: Brightkite, Delicious,  deviantART, Digg, Dopplr, Ember, Facebook, Flickr, Friendfeed, Google  Profile, Last.fm, LinkedIn, MySpace, Picasa Web, Posterous, Qik,  Readernaut, Reddit, RSS, StumbleUpon, Tumblr, Twitter, Technorati,  Viddler, Vimeo, Virb, and YouTube!
Requires WP Version:  2.8 or higher.
GetSocial
GetSocial  Homepage →
GetSocial adds an intelligent, lightweight, quick to  setup floating social media sharing box on your blog posts that is  always visible and accessible even if the user scrolls down the page.  Its out-of-the-box functionality includes the Tweetmeme Retweet button,  Facebook Share button, Google Buzz button and the Stumbleupon Submit  button. You can quite easily add any number of additional social media  sharing buttons.
Requires WP Version: 2.7 or  higher.
Drag to Share eXtended
Drag  to Share eXtended Homepage →
WP Drag to Share eXtended is a  plugin that allow to your readers to share one of your blog’s pages  (through your article’s images) on the social networks sites such as  Twitter and Facebook but also on Delicious.
Requires WP  Version: 2.8 or higher
AddToAny
AddToAny  Homepage →
AddToAny allows you to share, bookmark, and email  your posts and pages using any service, such as Facebook, Twitter,  Google Buzz, Digg, Delicious, and well over 100 more social bookmarking  and sharing sites. The button comes with AddToAny's customizable Smart  Menu, which places the services visitors use at the top of the menu,  based on each visitor's browsing and usage history.
Requires  WP Version: 2.0 or higher.
Sociable
Sociable  Homepage →
Sociable automatically adds links to your favorite  social bookmarking sites on your posts, pages and in your RSS feed. You  can choose from 99 different social bookmarking sites. (Sociable is what  we are currently using on Speckyboy).
Requires WP Version:  2.6 or higher
SexyBookmarks
SexyBookmarks  Homepage →
Though the name may be a little "edgy" for some,  SexyBookmarks has proven time and time again to be an extremely useful  and successful tool in getting your readers to actually submit your  articles to numerous social bookmarking sites.
Requires WP  Version: 2.7 or higher.
Digg Digg Plugin
Digg  Digg Plugin Homepage →
The Digg Digg plugin is an all-in-One  social vote buttons including the following services: Digg, Reddit,  dDone, Yahoo Buzz, TweetMeme(twitter), facebook share, facebook like,  Polladium, StumbleUpon, Delicious, Sphinn, Google Buzz, Designbump,  Designfloat, WebBlend and BlogEngage.
Requires WP Version:  2.0 or higher.
Socialize
Socialize  Homepage →
Socialize is an easy way to selectively add  actionable social bookmarks to your posts. You can add bookmarks in two  places: Inside the content (aligned left or right) or in a box below the  content.
Instead of adding new meta keys like other plugins  require, there is an additional panel in your posts admin that allows  you to select which bookmarks you want to display. This is to encourage  people to choose more relevant bookmarks for their posts. You are also  provided with a box at the bottom of your posts that asks readers to  subscribe and comment.
Requires WP Version: 2.7 or  higher.
Light Social
Light  Social Homepage →
This is a super lightweight plugin that  inserts a set of social share links at the bottom of each post. With  this plugin you have simple options to configure – Simply enable or  disable to show or not the bookmark social links. Very simple. It is all  is implemented using the most simplistic html code to ensure fast load  and minimal impact on your blog.
Requires WP Version:  2.9 or higher.
Share and Follow
Share  and Follow Homepage →
Share and Follow has been designed for  the average users to use and is ideal for developers who want to save  time. It gives links to the most prominent Social Networking sites for  sharing and following, presented in many different formats  (widgets/shortcode/template tag/auto added).
Requires WP  Version: 2.9.0 or higher.
Social Bookmarks
Social Bookmarks is a WordPress plugin, with an  AJAX front-end interface, that adds a list of XHTML compliant graphic  links at the end of your posts that allow your visitors to easily submit  them in a number of different social bookmarking sites.
The plugin  supports more than fifty sites and that is without including the sites  of the available Site Packs.
Requires WP Version:  2.5.1 or higher.
Social  Bookmarks Homepage →