Have you ever wanted to highlight a valuable comment among all others? Or not let that troll 6-paragraphs comment take more space than it deserve? Or even hide a whole thread of offtipics?
Well, now you can!
<a href="http://hikari.ws/featured-comments/" rel="nofollow ugc">Hikari Featured Comments</a> is a simple plugin that adds 3 new custom fields to comments, allowing you to add special properties to each of them.
With this feature available, you can query any comment to know if it has any of those properties flagged, and if so you can take special actions within your theme or another plugin.
<h4>Features</h4>
There are 3 special properties available, you can give them any semantic you like, but default meanings are as follows: 
* Featured: a comment flagged as featured should be highlighted from all others. You can give it special CSS styles from your theme to make it more visible among all comments, and flag any valuable comment as so. 
* Buried: a buried comment is a comment you don’t wanna just delete, but also don’t want it as visible as all others. You can use it to hide offtopic comments which you don’t want to perpetuate. 
* Children/Threaded buried: this one has similar meaning to the former, but it should be applied to nested/threaded/children comments of the flagged comment.
Note that any comment can be independently flagged as Buried and Children buried, therefore a Children buried comment shouldn’t have special styles applied to itself. In the same way, you can also have a featured AND buried comment, having both styles should be applied together!
Hikari Featured Comments provides a special metabox in comment edit page (/wp-admin/comment.php?action=editcomment&c=XXXX) where you can flag these properties, and it automatically attach new classes (<code>featured</code>, <code>buried</code>, <code>children_buried</code>) to comments in frontend.

Hikari Featured Comments

It adds 3 new custom fields to comments (Featured, Buried, Children buried), allowing you to add special properties to each of them.

OpenWeb Admin

Comments Evolved ( formerly Google+ Comments for WordPress ) makes the comment section tabbed seamlessly adding tabs for G+ Comments, Facebook, Disqus, WordPress Comments, and Trackbacks
If a user is required to create an account with your site before they can comment, you might as well ask them to fetch you a soda from mars. It’s probably not going to happen. However, if you can give them the option to comment with an account they’ve already set up, then you will be much more likely to get some interaction.
**Source Code @ Github: ** <a href="https://github.com/bholtsclaw/comments-evolved" rel="nofollow ugc">comments-evolved@github</a>
Using this plugin or JavaScript to load comments does NOT have a negative effect on your SEO, Google now indexes content ( and specifically comments ) loaded via JavaScript. See <a href="http://blog.optimum7.com/safon/google/google-now-indexing-fb-comments.html" rel="nofollow ugc">this link</a> and also <a href="http://webmasters.stackexchange.com/questions/27042/effect-on-seo-of-lazy-scrolling-on-html-comments" rel="nofollow ugc">this one</a> for more details.
<ul>
<li>You should have <a href="http://plus.google.com/authorship" rel="nofollow ugc">Google Authorship</a> already setup and in use for your site.</li>
<li>I’ve setup a page so if you want to <a href="http://www.wepay.com/donations/brandonholtsclaw" rel="nofollow ugc">Donate</a> to this plugins development, now you can.</li>
</ul>
This plug-in is not endorsed or associated with the Google, Twitter, Disqus, Facebook, WordPress.org, Automattic, or WordPress HelpCenter.

Comments Evolved for WordPress

cool extension
Adds Google and Facebook in no time
Super simple to use!



Simple and nice looking

Comments Evolved ( formerly Google+ Comments for WordPress ) makes the comment section tabbed seamlessly adding tabs for Comments & More

Hikari Featured Comments vs Comments Evolved for WordPress