Add Link to Facebook plugin for WordPress by Marcel Bokhorst automatically add links to published posts or pages to your Facebook wall, pages or groups and more.
The way links appear on Facebook can be customized. There is support for multi-user and network sites and shortcodes will be processed. The plugin works for remote publishing as well, for example from Android or iOS (iPhone, iPad) powered devices or using Window Live Writer or from Linux using BloGTK or Blogilo.
Additional features:
Show the names of the people who liked your post on Facebook below the post/page text
Show the standard Facebook like button; this button is not connected to added links
Show the standard Facebook send button; this button is not connected to added links
Support for the Open Graph protocol
Shortcodes and template tags for liker names, like button, like box, send button, Facepile and profile icon/link
Integrate Facebook comments and likes on added links into WordPress
Post WordPress comments back to Facebook
Copy Facebook comments to the WordPress database (for archiving, editing, replying, moderation, etc)
Sidebar widget for Facebook comments/messages and/or like/send button, like box, comments plugin, Facepile and/or a link to your Facebook profile
Facebook registration/login (development)
This plugin requires PHP 5 and WordPress 3.0 or better
Author WordPress page: http://blog.bokhorst.biz/category/computers-en-internet/wordpress/
Download and info: http://wordpress.org/extend/plugins/add-link-to-facebook/