Pavel

Using this plugin, you can create redirects for any post types or taxonomies.
How to use:
<ul>
<li>In the “Tools” menu, find the “Htaccess Redirect” menu item.</li>
<li>Select the post types and taxonomies for which you want to create redirects.</li>
<li>In the “New site domain” field, enter the URL of the site to which the redirect will be made.</li>
<li>Click the “Generate” button.</li>
<li>Insert the generated redirects at the beginning of the .htaccess file.</li>
</ul>

Redirects for Htaccess

Generates redirect code for .htaccess file

M.Code

Jan Fabry

Understand how rewrite rules work could be userful. 
Natively on WordPress you can’t analyze what’s working / not working regarding your urls. 
Through this interface you will be able to analyze every single url and see what’s matching.
Warning 
This tool will not change / add any rules for you it’s only an analyzer
<h4>Main features:</h4>
<ul>
<li>Live URL Analyzer</li>
<li>Highlight parameters</li>
<li>AJAX Permalinks refresh button</li>
<li>Change UI (Light / Dark)</li>
</ul>

Url Rewrite Analyzer

See clearly and understand how WordPress rewrite rules work within a simple and clean interface

Redirects for Htaccess vs Url Rewrite Analyzer