alaingg

The plugin replaces your comment form and includes one that also allows to use the facebook credentials.
Special Features:
<ul>
<li>When users comments on your blog they can choose to send notifications to their Facebook Wall.</li>
<li>Notification is automatically sent to the facebook application wall when a comment is submitted.</li>
<li>Simple Facebook Integration.</li>
<li>Using the plugin should increase the traffic and visibility of your blog.</li>
<li>More easy to comment.</li>
</ul>
Visit the <a href="http://web-argument.com/wordpress-comments-switcher/" rel="nofollow ugc">Plugin Page</a> to see the plugin working.

Comments Switcher

Allows users to comment on your blog using the facebook credentials or the default wordpress guest credentials.

qsheeraz

GenialSouls

<blockquote>

 WP Social (Facebook) Comments
 
</blockquote>
The WP Social (Facebook) Comments lets people comment on content on your site using their Facebook account. People can choose to share their comment activity with their friends (and friends of their friends) on Facebook as well. Also you can moderate the comments by using Facebook tools.
<blockquote>
You May Also Like
</blockquote>
<blockquote>

 <a href="https://wordpress.org/plugins/disable-wp-comments/" rel="ugc">Disable WP Comments </a> | <a href="https://wordpress.org/plugins/wp-instagram-post/" rel="ugc">WP Social Post and Widget </a> | <a href="https://wordpress.org/plugins/woosocio/" rel="ugc">WooSocio</a> | <a href="https://wordpress.org/plugins/wootweet/" rel="ugc">WP Twitter Post (WooTweet)</a>
 
</blockquote>
<h4>NEW WP Social Comments Pro version</h4>
<blockquote>
<a href="https://genialsouls.com/product/wp-facebook-comments-pro/" rel="nofollow ugc">WP Social Comments Pro version</a>
</blockquote>
Just released pro version of WP Social Comments having many exciting new features.
<h4>Pro features</h4>
<ul>
<li>Easy Moderation.</li>
<li>Moderation with your Facebook Profile.</li>
<li>Moderation with Facebook App.</li>
<li>Facebook Comments Widget.</li>
<li>Localized in 56+ Languages.</li>
<li>Comments by Shortcode for pages and custom locations.</li>
<li>Comments for all posts and CPT.</li>
<li>Fully Responsive.</li>
<li>Fully customizable.</li>
<li>And many more to come…</li>
</ul>

WP Social Comments

A ton of thanks for this nice plugin. No hassle...... Just install, activate and put the app ID....... Go through the settings area and check how it works. :D 

What a nice plugin!

What I can say is Great Support!

The WP Social (Facebook) Comments lets people comment on content (pages, posts etc) on your site using their Facebook account.

Comments Switcher vs WP Social Comments