Facebook comments plugin will help you display Facebook Comments on your website. You can use Facebook Comments box on your pages/posts.
The unique Social Plugin to let you integrate Social Login, Social Share and Social Comments at your website
This plugin integrates Cackle Comment System (Google+, Twitter, Facebook, VKontakte, Odnoklassniki and other) right into your website.
Integrate Facebook Comments, Google Plus Comments and/or Disqus Comments on your website