This plugin adds a new widget which can show statistics for your blog’s/forum’s 
Disqus comments: most popular discussions, top commenters, recent comments.
Configurable are: 
 * Color Theme 
 * Number of items to show 
 * Default tab view (most popular discussions, top commenters, recent comments) 
 * Whether to show the standard WordPress widget title bar 
 * Title of the widget in the title bar

Disqus Widget

Allows the user to display statistics for their blog's/forum's Disqus comments.

With this plugin you can easily replace the standard WordPress commenting form with one of the popular commenting system’s widget, such as <a href="https://disqus.com/" rel="nofollow ugc">Disqus</a> and <a href="https://www.hypercomments.com/" rel="nofollow ugc">HyperComments</a> or with the VKontakte comments widget.
<h4>Working with plugin</h4>
<ul>
<li>After installation you should go to the plugin settings page in the Comments section and paste the comments widget into a single form field and then click Save Changes.</li>
<li>To get the widget code you will need to register at the appropriate commenting system’s website (or create a simple application for VKontakte).</li>
<li>You can add to the widget code any custom HTML markup.</li>
<li>Any custom text or HTML/JavaScript code will be displayed instead of the standard WordPress comments.</li>
<li>Just leave the field empty to hide the comments on all pages.</li>
</ul>

WP Custom Comments

Replacing the standard WordPress commenting form with custom HTML/JavaScript code.

Disqus Widget vs WP Custom Comments