ThemeShock

<p>Custom 404, helps you customize your 404.<br />
From the dashboard options you’re able to modify the background, the image and the fonts color and style.</p>
<p>This page will show users the last post on your site, so that they may choose to follow one of this instead of leaving your page.</p>
<h3>Features</h3>
<ul>
<li>Customizable background</li>
<li>Several Patterns</li>
<li>Multiple fonts</li>
<li>24 additional images.</li>
<li>5 Different languages</li>
</ul>


Custom 404 Error Page: Unilimited designs and colors

Custom 404, creates a 404 page that is set to the default one of your WordPress installation.
This page is fully customizable from the dashboard.

FAKTOR VIER

<p>Sometimes the WordPress default error page handling is not enough, because it only shows a simple text or you have to create a custom 404 template with (more) static content.<br />
<a href="https://www.f4dev.ch" rel="nofollow ugc">F4 Error Pages</a> allows you to assign any existing page from your installation to be shown, if a page is not found or the permissions for a request is denied.<br />
So you can create nice and informative error pages with your own content elements or whatever you like, fast, without overhead and unnecessary features.</p>
<h4>Usage</h4>
<p>After installation you can assign existing pages as error pages. By default there are no pages assigned.<br />
You can access the settings page either if you click the ‘Settings’ link in the plugins list or you can find it directly in the menu (Settings -> Error Pages).</p>
<h4>Features overview</h4>
<ul>
<li>Show custom page if requested url is not found (404)</li>
<li>Show custom page if permission is denied (403)</li>
<li>Easy to use</li>
<li>Lightweight and optimized</li>
<li>100% free!</li>
</ul>


F4 Error Pages

With this simple plugin you can assign custom pages (with custom content etc.) as error pages. This works for 404 (page not found) and 403 (forbidden/ …

Custom 404 Error Page: Unilimited designs and colors vs F4 Error Pages