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.

wpyb

To prevent that usernames are publically visible, the username in the author’s permalink is replaced with the author’s ID. 
In case the page is invoked with the default permalink structure, it is displayed “Page not found”.
Additionally it is possible to modify the author base. It is recommended to make use of this plugin to change it, but it also works with other plugins that have the functionality to customize the author base.

Change Author Link Structure

To prevent that usernames are publically visible, the username in the author's permalink is replaced with the author's ID.

Taro External Permalink vs Change Author Link Structure