- Magento: Facebook Social plugins (with Facebook Like button) : http://www.magentocommerc
e.com/e… — Note that it's a paid extension (19€).
- Drupal Commerce, being based on Drupal, will play well with any Drupal Open Graph Protocol plugin. See http://www.drupalcommerce
Note that it should be pretty straightforward to implement OGP into any modern E-Commerce platform (Basically, it all boils down to adding a few meta tags to your page).
Because it's only about metadata at the page level (not at a more granular level), it's probably way simpler than implementing RDF or GoodRelations, for example.