Facebook and Drupal
Howto: Integrate Facebook Open Graph With Wordpress Facebook Open Graph protocol allows you to share your blog content not only with your readers, but their Facebook friends as well. The best part is – whenever someone liked your content(s), it will be published on their Facebook profile.
Open Graph meta tags This module makes it easy to add Open Graph meta tags (http://opengraphprotocol.org/) to a node to enable it to be come a "rich" social object. For instance, Facebook uses this information to work out how to preview shared content in a user's Facebook profile (http://developers.facebook.com/docs/share). Features
This set of modules turns Drupal into a platform for developing Facebook Applications. for Facebook
for Facebook (fb)
Open graph and I Like
Support Open Graph Protocol meta tags Open Graph Protocol is described here: http://developers.facebook.com/docs/opengraph It is a Facebook initiative and used by at least Facebook (but not limited to them).
Drupal 7 for Facebook | It's a new year... there's a new drupal... and I'm very happy to report a new version of modules/fb for Drupal 7! It is a work in progress, as modules/fb contains a number of sub-modules; as I write this, only the most important have been upgraded to D7.