highimpacttech

This plugin adds .html (or any extension) to your WordPress page and category urls.
You can change the extension from Plugin Setting page.

Custom category and page extensions

Add any ".extension" to WordPress category and page urls.

gokulakrishnan

You can create unlimited redirections and rewrites. A redirect and rewrite can be used in many situations, for example:
<ul>
<li>to hide an url you don’t want to show;</li>
<li>to short a long url;</li>
<li>to monitor the traffic of an url;</li>
<li>to redirect the users in another page during a maintenance;</li>
<li>to redirect user from a dormiant domain;</li>
<li>to rewrite the content with customized urls </li>
<li>to customize whatever name you want</li>
</ul>
Language available only in english

Url Redirect Rewrite

Manage Unlimited Redirections and Rewrites

Custom category and page extensions vs Url Redirect Rewrite