termel

Checks wether som posts are missing their featured images. 
After migrating your website to wordpress, you need to make sure all content has a featured image in order to ensure your visitors won’t find empty spaces or non-aesthetic pages.

Check Missing Featured Images

Checks whether some posts are missing their featured images, tipically after a migration from another site.

Kenny

The goal of this plugin is to make is really easy for someone on 
Wordpress to implement the NotFound.org missing child page in 
place of their standard 404 page.
The HTTP 404 is the error that you see when a link is broken, 
or you navigated to web page that just isn’t there. It happens, 
and it’s one of the most common error pages you see.
Why not turn that into something that benefits the world? The more 
eyes that see a missing child, the more likely someone could be 
found.
Note: Activating this plugin will automatically replace your 
default WordPress 404 page. To stop it, simply deactivate.
All of the missing child notices are served within an iframe 
pointing to <a href="http://notfound.org" rel="nofollow ugc">NotFound.org</a>.
<a href="http://twitter.com/_kennyk_" rel="nofollow ugc">@_kennyk_</a> for updates, or visit 
<a href="http://codefury.net" rel="nofollow ugc">codefury.net</a>
<h3>Notes</h3>
Because of the current width of the NotFound.org page (720px), it only 
made sense to put it in a separate layout from your site, rather 
then embed it in the current theme. If NotFound.org eventually 
provides a more portable version, I’ll accommodate that too.

NotFound.org 404 Page

This is a Wordpress plugin that turns your 404 "page not found" error into a page devoted to helping find missing children.

Check Missing Featured Images vs NotFound.org 404 Page