Aaron D. Campbell

Expire Comment Links was inspired by <a href="http://yoast.com" rel="nofollow ugc">Joost de Valk</a> 
in an article he wrote called 
<a href="http://www.searchcowboys.com/columns/764" rel="nofollow ugc">Comment links: an experiment</a>. 
It all started when Matt Cutts talked about how Google changed how it handles no 
follow links in his article on 
<a href="http://www.mattcutts.com/blog/pagerank-sculpting/" rel="nofollow ugc">PageRank Sculpting</a>.
No one knows for sure yet if this will be beneficial or not, but for those that 
want to be on the cutting edge and try this experiment for themselves, this 
plugin automates everything.
Requires PHP5.
You may also be interested in <a href="http://wpinformer.com" rel="nofollow ugc">WordPress tips and tricks at WordPress Informer</a> or general <a href="http://webdevnews.net" rel="nofollow ugc">Web Developer News</a>

Expire Comment Links

Allows you to stop displaying links for old comments. PHP 5+ required.

Rhys Wynne

This plugin is designed for people who has a developmental site that is different from the live site.
This plugin will warn you should you have blocked search engines in your blog. If you then move the database from your developmental site to your live installation, or change your blog’s domain URL, then the warning will reappear, and not move until you have either unblocked search engines or made the plugin aware you have changed domains.
It’s designed to help stop you accidentally blocking your live WordPress installation from search engines.
<h4>About Winwar Media</h4>
This plugin is made by <a href="http://winwar.co.uk/" rel="nofollow ugc">Winwar Media</a>, a WordPress Development and Training Agency in Manchester, UK.
Why don’t you?
<ul>
<li>Check out our book, <a href="http://winwar.co.uk/books/bbpress-complete/" rel="nofollow ugc">bbPress Complete</a></li>
<li>Check out our other <a href="http://winwar.co.uk/plugins/" rel="nofollow ugc">WordPress Plugins</a>, including <a href="http://wpemailcapture.com" rel="nofollow ugc">WP Email Capture</a></li>
<li>Follow us on Social Media, such as <a href="https://www.facebook.com/winwaruk" rel="nofollow ugc">Facebook</a>, <a href="https://twitter.com/winwaruk" rel="nofollow ugc">Twitter</a> or <a href="https://plus.google.com/+WinwarCoUk" rel="nofollow ugc">Google+</a></li>
<li><a href="http://winwar.co.uk/contact-us/" rel="nofollow ugc">Send us an email</a>! We like hearing from plugin users.</li>
</ul>

Check Search Engine Visibility on Migration

Checks if a site it's inivisible to search engines after a migration. If so, then the plugin warns you to review this setting.

Expire Comment Links vs Check Search Engine Visibility on Migration