ShinichiN

This plugin enables you to create unlimited custom sidebar/widget areas and switch existing areas. You can do this without touching your theme.
This plugin utilizes term meta api and so it works only with WordPress 4.4 and above.
Your theme needs to use <code>is_active_sidebar()</code> when calling <code>dynamic_sidebar()</code> function.
This will work.
<pre><code>if ( is_active_sidebar( 'sidebar-1' ) ) {
 dynamic_sidebar( 'sidebar-1' );
}
</code></pre>
This doesn’t work.
<pre><code>dynamic_sidebar( 'sidebar-1' );
</code></pre>
If you only want to output your custom sidebar, put this code on where you want to display the sidebar in your theme.
<pre><code>do_action( 'dynamically_dynamic_sidebar' );
</code></pre>
<a href="https://github.com/ShinichiNishikawa/Dynamically-Dynamic-Sidebar/" rel="nofollow ugc">This Plugin published on GitHub.</a>
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Dynamically Dynamic Sidebar

Create unlimited custom sidebar/widget areas and switch existing areas depending on post, page, custom-post-type post, categories, tags and custom tax …

thinkerwebdesign

<h4>Features:</h4>
<ul>
<li>Add sidebars to WP Posts and Pages with shortcodes using a sidebar Name or sidebar ID.</li>
<li>Add one or more optional custom classes to match your theme styles or custom CSS styles.</li>
</ul>
<h4>How to Use:</h4>
Method 1 – (Recommended Use: Add a sidebar using a sidebar Name.)
A sidebar Name can be found in the <code>Appearance > Widgets</code> section of your WordPress Admin Area.
Example uses:
<ul>
<li><code>[sidebar name="your-sidebar-name"]</code></li>
<li><code>[sidebar name="your-sidebar-name" class="custom-class"]</code></li>
<li><code>[sidebar name="your-sidebar-name" class="custom-class-1 custom-class-2 custom-class-3"]</code></li>
</ul>
Method 2 – (Advanced WP Users: Add a sidebar using a sidebar ID.)
A sidebar ID can be found in your theme’s <code>register_sidebar</code> functions, usually in the theme’s <code>functions.php</code> file.
Example uses:
<ul>
<li><code>[sidebar id="your-sidebar-id"]</code></li>
<li><code>[sidebar id="your-sidebar-id" class="custom-class"]</code></li>
<li><code>[sidebar id="your-sidebar-id" class="custom-class-1 custom-class-2 custom-class-3"]</code></li>
</ul>
General Notes
<ul>
<li>The spelling and capitalization of a shortcode Name or ID must exactly match that of the desired sidebar.</li>
<li>Definition of an active sidebar: An active sidebar is a sidebar that contains widgets.</li>
<li>A <code>[sidebar]</code> shortcode without an active sidebar Name or active sidebar ID displays nothing.</li>
<li>An active sidebar ID overrides a sidebar Name if both are present in the same shortcode.</li>
<li>There is no limit to the number of shortcodes that can be used on the same page or post.</li>
<li>The same sidebar shortcode can be used multiple times on the same page or post.</li>
</ul>
HTML Class Notes
<ul>
<li>Separate multiple custom classes using a space character. Examples shown in <code>Method</code> sections above.</li>
<li>There is no limit to the number of custom classes that can be used.</li>
<li>Each custom class must only contain (letter,number,-,_) characters, otherwise all custom classes are omitted.</li>
<li>The sidebar ID is always added to the HTML class attribute if it contains only (letter,number,-,_) characters.</li>
</ul>
<h4>Demo:</h4>
<a href="http://www.thinkerwebdesign.com/thinker-sidebar-shortcode-plugin/" rel="nofollow ugc">Visit Plugin URI</a>

Sidebar Shortcode

Add sidebars to WordPress posts and pages using shortcodes with a sidebar Name or ID.

Dynamically Dynamic Sidebar vs Sidebar Shortcode