domclic

EffortLess Disable All Comments allows you to disable comments, trackbacks, and avatars across your WordPress site or multisite network with a single checkbox. When enabled, it removes comment functionality, hides the Comments and Discussion menus, and blocks comment submissions. Uncheck to restore all features.
Features:
<pre><code>Disables comments and trackbacks for all post types.
Removes avatars site-wide.
Hides Comments and Discussion settings in the admin.
Blocks comment submissions via frontend, admin, and REST API.
Multisite support: applies settings network-wide.
Simple toggle to enable/disable.
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EffortLess Disable All Comments

Completely disables comments, trackbacks, and avatars site-wide or network-wide with a single toggle. Multisite compatible.

LinksAlpha

Get Support: support@linksalpha.com
Plugin shows Twitter users who recently tweeted links from your blog. In other words, quick and easy way to get your Twitter community rolling 🙂
Plugin shows Tweets linking your Blog posts. Tweets show up below the comment form on each blog post
Plugin shows Count of Tweets linking to your blog. Count can be configured to show next to “Comment Count” or “Blog Post Date” for each blog post.
Check out our other plugins that you will find extremely useful:
<ul>
<li>Social Discussions: show popularity of your blog posts on Social Networks including Twitter, Facebook, Google Buzz, Yahoo, and bit.ly. https://wordpress.org/extend/plugins/social-discussions/</li>
<li>Social Stats: track your blog activity on social networks – monthly/weekly/daily, and track your popular posts. https://wordpress.org/extend/plugins/social-stats/screenshots/</li>
<li>Network Publisher: auto publish your blog posts to Twitter, Facebook, LinkedIn, Yahoo, Yammer, Identi.ca, and MySpace. https://wordpress.org/extend/plugins/network-publisher/</li>
<li>Buzz Roll: let your users share your blog post on fastest growing social hub – Google Buzz. https://wordpress.org/extend/plugins/buzz-roll/screenshots/</li>
</ul>

EffortLess Disable All Comments vs Retweeters