Marco Milesi

WP Post Redirect allows you to seamlessly redirect individual posts to external URLs or internal content. Once activated, a new metabox appears on the post edit screen, letting you specify a custom redirect URL or search for an internal post/page. Great for affiliate links, content curation, or moving content.
Features: 
* Add a redirect URL to any post via a simple metabox. 
* Search and select internal posts or pages for redirection. 
* Set custom HTTP Status codes (301, 307, 308) globally or per post. 
* Option to open redirects in a new tab and allow <code>rel="nofollow"</code>. 
* Highlight posts with active redirections in the admin area. 
* Dashboard options page to manage all redirections with CSV Export. 
* Backend column to mark posts with redirect enabled. 
* Lightweight and easy to use. 
* Fully compatible with the latest WordPress versions.

WP Post Redirect

Easily redirect your WordPress posts to any external URL with a simple metabox. Lightweight, efficient, and perfect for SEO!

sevenspark

The Menu Swapper provides two utilities:
<ol>
<li>
A settings page that allows you to register unlimited menu theme locations
</li>
<li>
A meta box that will appear on Pages and Posts, which will allow you to replace existing menu theme locations with your new theme locations for those individual Posts/Pages.
</li>
</ol>
<a href="http://www.youtube.com/watch?v=kAd0_RKvvLw" rel="nofollow ugc">Video demo</a>

Menu Swapper

The Menu Swapper allows you to register custom theme locations and easily swap menus on individual Pages or Posts.

WP Post Redirect vs Menu Swapper