Social Plugins

Social plugins let you see what your friends have liked, commented on or shared on sites across the web.

Like Button The Like button lets users share pages from your site back to their Facebook profile with one click.

Send Button The Send button allows your users to easily send your content to their friends.

Subscribe Button The Subscribe button allows people to subscribe to other Facebook users directly from your site.

Comments The Comments plugin lets users comment on any piece of content on your site.

Activity Feed The Activity Feed plugin shows users what their friends are doing on your site through likes and comments.

Recommendations The Recommendations plugin gives users personalized suggestions for pages on your site they might like.

Like Box The Like Box enables users to like your Facebook Page and view its stream directly from your website.

Login Button The Login Button shows profile pictures of the user's friends who have already signed up for your site in addition to a login button.

Registration The registration plugin allows users to easily sign up for your website with their Facebook account.

Facepile The Facepile plugin displays the Facebook profile pictures of users who have liked your page or have signed up for your site.

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Deprecated Plugins

• The Live Stream Plugin has been deprecated and will be removed on October 3, 2012. Please migrate to use the Comments Plugin instead.

Source: http://developers.facebook.com/docs/plugins/