Vitor Carvalho

For those who do not need to have the Comments feature in WordPress (there are a lot of reasons), this plugin removes any trace of that existence in both wp-admin and front-end. 
Your theme must rely properly on the WordPress API for the front-end support. The tag must be present. 
Completely done through techniques based on both action hooks and CSS.
Doesn’t requires any configuration, just install and any trace of Comments will disappear.
NOTE: This does NOT play with the core, so you are able to update both plugins and WordPress without any trouble.
<h4>Provided Custom Hooks</h4>
This plugin provides 4 custom hooks you may play if you need more substance in your theme.
<pre><code>add_action( 'hide_comments_post_types', 'my_hide_comments_post_types' ); to change the list of post types to be processed by the plugin. Comments will be removed from all listed post types.
add_action( 'hide_comments_css', 'my_hide_comments_css' ); to add arbitrary CSS to hide comment's stuff from your theme.
add_action( 'hide_comments_template_comments_path', 'my_hide_comments_template_comments_path' ); the default path is the empty file template-comments.php located in the same dir of this plugin. Just modify the path to your own file if you want to return anything else.
add_action( 'hide_comments_dashboard_right_now', 'my_hide_comments_dashboard_right_now' ); if true is returned, the discussion table of dashboard right now widget will be hidden. False otherwise. Defaults to true.
</code></pre>
The use of these hooks are recommended, thus, if the plugin gets deactivated, those hooks will not be called anymore and then you get things consistent and clean.
Do you want to translate it to your language? Just reply to the «Translations» topic in the forum.

Hide Comments Feature

Remove comments functionality and related in your Wordpress instance.

TylerShaw

What’s It Do?
Hidden Widget Titles simply allows for widget titles to be visible in the admin panel but not on the website.
Why Use It?
WordPress sidebars with a large amount of widgets can get pretty hard on the eyes. This plugin allows you give the widgets names for organization purposes in the admin panel, while preventing those titles from being needlessly output on your website.
How Does It Work?
Very simply. If you wish to hide the entire title, simply add a ! as the first character in the title. If you wish to hide sections of the title, surround those sections with square brackets [];
Roadmap
This plugin is very simple and serves a specific purpose. For this reason, there are no planned features. However, the plugin is actively maintained.
If you have an idea, suggest it.
Notes
<ul>
<li>The plugin will have unexpected results if you nest hidden sections, such as: [hidden [title]]</li>
</ul>

Hidden Widget Titles

Allows widget titles to be hidden from display on the front of the website.

Hide Comments Feature vs Hidden Widget Titles