Greenweb

Only use this plugin if you already have Ozh’s Admin Drop Down Menu installed.
Ozh’s Admin Drop Down Menu is a great ui option 
But it should be an option that does not effect every author, editor and admin on a website
If you like this plug-in please give it a five star rating, blog about it, Tweet about it and tell your WordPress friends.

Hide Option for Ozh's Admin Drop Down Menu

Gives your users the ability to turn off Ozh's Admin Drop Down Menu in their profile

Philipp Speck

With this plugin you can edit sidebar contents like posts in the admin area and assign them from a dropdown menu to any post or page. It supports flexible dropping via widget for independent theme association.
It’s a matter of fact that people don’t want to code when they just want to change their contents. To keep a website interesting for visitors you can change the sidebar contents in context to the main content. Before you could realize it with different sidebar templates or conditional tags. 
Now you can do all these great things inside the admin area without any coding. 
Any anyway: Since we organize informations in databases all contents should be stored there as well.
From a dropdown menu you can easily choose all sidebars you have created.
<h4>Features</h4>
<ul>
<li>Own <code>meta box</code> on post/page edit pages</li>
<li>Own menu item in admin menu</li>
<li>Registrates own <code>post type</code> for sidebars</li>
<li>Full editable sidebars like posts</li>
<li>Assign sidebars from dropdown menu</li>
<li>Flexible widget support</li>
<li>No coding needed</li>
<li>Oldest sidebar as default post</li>
<li>Loads sidebar from parent page if not assigned for children</li>
<li>Localization in English and German</li>
</ul>
<h4>Related Links</h4>
<ul>
<li><a href="http://www.typomedia.org/wordpress/plugins/wordpress-custom-sidebar/" title="Homepage of WordPress Custom Sidebar" rel="nofollow ugc">Homepage</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-custom-sidebar/changelog/" title="Changelog for WordPress Custom Sidebar" rel="ugc">Changelog</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-custom-sidebar/faq/" title="FAQ for WordPress Custom Sidebar" rel="ugc">Questions</a></li>
</ul>
Note: 
First drop the widget in the sidebar of your choice. Now uses oldest sidebar as default sidebar. Before installing or upgrading new plugins, please backup your database first! After upgrading to ‘WordPress Custom Sidebar 2.0’ you have to assign the widget again.

WordPress Custom Sidebar

With this plugin you can handle sidebar contents like posts and assign them from a dropdown menu.

Hide Option for Ozh's Admin Drop Down Menu vs WordPress Custom Sidebar