tmatsuur

This plugin increases the efficiency of spam distinction of a comment. It is possible to extract URL from the past spam comment and add to a blacklist. Moreover, URL contained in a new spam comment can be added to a blacklist.
<h4>Some features:</h4>
<ul>
<li>The key of a blacklist and a moderation list is automatically rearranged in order of a name. </li>
<li>Each key is movable by drag and drop. </li>
<li>URL contained in the accumulated spam comment can be added to a blacklist.</li>
<li>URL contained in a new spam comment can be added to a blacklist when marked spam. </li>
<li>The comment in which a few URL is contained can be marked as spam. </li>
<li>The extended blacklist corresponding to a regular expression can be used.</li>
</ul>
<h4>Support</h4>
<ul>
<li>Japanese – http://elearn.jp/wpman/column/blacklist-keys-manager.html</li>
</ul>
<h4>Translators</h4>
<ul>
<li>Japanese(ja) – <a href="http://12net.jp/" rel="nofollow ugc">Takenori Matsuura</a></li>
</ul>
You can send your own language pack to me.
Please contact to me.
<ul>
<li>http://12net.jp/ (ja)</li>
<li>@tmatsuur on twitter.</li>
</ul>
<h4>Contributors</h4>
<ul>
<li><a href="http://12net.jp/" rel="nofollow ugc">Takenori Matsuura</a></li>
</ul>
<h3>Credits</h3>
This plug-in is not guaranteed though the user of WordPress can freely use this plug-in free of charge regardless of the purpose. 
The author must acknowledge the thing that the operation guarantee and the support in this plug-in use are not done at all beforehand.
<h3>Contact</h3>
email to takenori.matsuura[at]gmail.com 
twitter @tmatsuur

Blacklist keys manager

The increase in efficiency of management of a comment blacklist is attained, and a spam comment is blocked.

Frank Corso

SiteAlert

SiteAlert checks your WordPress installation to ensure that it is healthy, up to date, and secure. Use the SiteAlert page to quickly see the results of the checks using the simple color-coded sections.
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<h4>Currently Checks</h4>
WordPress Version 
This plugin checks to make sure that your site is using the latest version of WordPress.
MySQL or MariaDB Version 
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This plugin checks to ensure that your server is running a version of PHP that is still receiving security updates.
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This plugin checks to make sure all your plugins are up to date.
Inactive Plugins 
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Admin Username 
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Plugins No Longer Being Supported 
This plugin checks to see if you have any plugins installed that are no longer supported by the developer.
Theme Updates 
This plugin checks to make sure all of your themes are up to date.
SSL 
Checks to see if you have SSL on your site.
File Editor 
Checks if your site has disabled the file editor.
Spam Comments 
Checks to make sure you don’t have too many spam comments.
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<h4>Make Suggestions Or Contribute</h4>
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If you are a developer, this plugin integrates with the REST API. The endpoints can be enabled from the settings tab of the “SiteAlert” page in the tools menu.

SiteAlert (Formerly WP Health)

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Blacklist keys manager vs SiteAlert (Formerly WP Health)