Alex Moss

Google+ comments was introduced in April 2013 to blogger.com users. This plugin lets you add Google+ comments to your WordPress site!
Simply install the plugin and follow the instructions on the Settings page.
<ul>
<li><a href="http://3doordigital.com/wordpress/plugins/google-plus-comments/" rel="nofollow ugc">Google+ Comments</a> Plugin homepage.</li>
<li>More <a href="http://3doordigital.com/wordpress/plugins/" rel="nofollow ugc">WordPress Plugins</a>.</li>
</ul>
You can also insert the comment box as a shortcode into any post, page or template and use your own settings for each time you do it! Simply use the shortcode [gp-comments]

Google+ Comments

The Google+ Comments WordPress plugin makes it easier for you to setup, administer and customise Google+ comments from your WordPress site.

Thomas Maier

Fine tune comments in WordPress.
You can find the settings page under <code>Comments > Settings</code> in the dashboard.
Features
<ul>
<li>remove comments from post type: posts, pages, attachments and other public custom post types</li>
<li>[more coming soon]</li>
</ul>
I am open to your suggestions for more features here or in the <a href="https://github.com/webgilde/comments" rel="nofollow ugc">github repository</a>

Comments

Customize and optimize comments in WordPress

Google+ Comments vs Comments