mandsconsulting

Some commentors try to abuse the WordPress Comment’s built in URL feature by submitting advertising, spam, or otherwise unwanted links.
Avoid Linkback Abuse tries to prevent this by providing two different modes of operation:
<ul>
<li>Strip all anchors from comment author’s names as they appear 
 in the comments list at the end of posts (always on when 
 the plugin is activated).
<ul>
<li>In addition to the above, this mode will remove 
entirely the ability for commentors to leave a URL. 
Assuming you’re using the default WP Comments plugin 
without any additional comment-modifying plugins, this 
mode still allows commentors to leave their name and email.</li>
</ul>
</li>
</ul>

Avoid Linkback Abuse (ALA)

Remove the URL field from the comments form to prevent linkback spam.

VelvetBlues.com

If you move your WordPress website to a new domain name, you will find that internal links to pages and references to images are not updated. Instead, these links and references will point to your old domain name. This plugin fixes that problem by helping you change old urls and links in your website.
<h4>Features:</h4>
<ul>
<li>Users can choose to update links embedded in content, excerpts, or custom fields</li>
<li>Users can choose whether to update links for attachments</li>
<li>View how many items were updated</li>
</ul>

Velvet Blues Update URLs

Updates all urls and content links in your website.

Avoid Linkback Abuse (ALA) vs Velvet Blues Update URLs