Marc Tönsing

lefalque

Adds a link next to the reply link below each comment, which allows visitors to flag comments as inappropriate. 
A sub page to comments in admin is added, where an administrator may review all the flagged comments and decide 
if they should be removed or not.
Admins or logged-in users with comment moderation permissions are able trash or replace comments with 
one click in the frontend. This action can not be undone. A “trash” link will appear bellow all comments. 
Don’t worry: You can untrash them if until you reload. You are also able to replace the comment text with a custom 
text which can be set in the settings.
<h4>Features</h4>
<ul>
<li>Ability for visitors to report comments they find offensive.</li>
<li>Once a flagged comment has been deemed ok, it wont be able to be flagged again.</li>
<li>Flagging is done via ajax for smoother experience for the visitors.</li>
<li>Decide whether all visitors or only logged in users can report comments.</li>
<li>Trashing and Replacing with ajax in the frontend for faster moderation.</li>
<li>Fully localized. Comes with English and German translations.</li>
</ul>

MarcTV Moderate Comments

Grants visitors the ability to report inappropriate comments and admins to replace and trash them in the frontend.

nosoycesaros

A WordPress plugin designed to mark posts by logged in users. Allows theme developers and administrators create and edit post flags, like favorites, seen, likes, etc, also provides an easy way to put this flags in your theme via shortcode.
Features:
<ul>
<li>Administrators can create flags like ‘Favorites’, ‘Seen’ or ‘Bookmark’ for early use</li>
<li>You can create as many flags as you want</li>
<li>Allows customization of HTML code for each flag</li>
<li>Insert in themes and post via <code>[shortcode]</code></li>
<li>This plugin creates favorite flag and button by default</li>
</ul>

Post Flagger

Add Favorite or any flag button to your posts. The easy way

MarcTV Moderate Comments vs Post Flagger