Fumiki Takahashi

TAROSKY INC.

This plugin add “External Link” section to your editor.
If your posts are used as news in your site, sometimes a post is titled simply “Our service is promoted in famous web magazine” and just having a single link to PR site.
This plugin will add a meta box to save metadata below:
<ol>
<li>External link</li>
<li>Open in new window</li>
</ol>
If you set external link, <code>the_permalink</code> will be replaced with it. The link in your widget, post archive, and so on will refer to the URL you saved.

Taro External Permalink

A WordPress plugin to allow some posts to have external permalink.

Frank Bueltge

Inpsyde GmbH

When you change the permalink structure then this is a problem for bookmarks of users and also for search engines to link to your posts. This plugin uses the slug of the new url and search for a ID in the database of WordPress. If it finds a post according to the slug, the Plugin will redirect to the correct post and send a header message “moved permanently 301” to change the url on the index of search engines.

Change Permalink Helper

Awesome!

It checks the Permalink and redirects to the new URL, if it doesn't exist. It sends the header message "moved permanently 301"

Taro External Permalink vs Change Permalink Helper