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>
ウィジェットエリアをいくつでも定義し、カテゴリやタグ、カスタム分類ごとに差し替えたり、投稿・ページ・カスタム投稿から使いたいサイドバーを指定したりすることができます。「スクリーンショット」のタブをごらんいただくと、イメージが湧きやすいと思います。

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 …

ArielK

Yakir Sitbon

pojo.me

With Pojo Sidebars you can create as many sidebars you need for any page you want. Especially for themes based on <a href="http://pojo.me/?utm_source=wp-repo&utm_medium=link&utm_campaign=sidebars" rel="nofollow ugc">Pojo Framework</a>.
You can easily separate your site into sections, as well as set a specific sidebar for every single page or custom post type.
You can replace any sidebar with a different one by embedding it in the Text Editor with a unique shortcode.
Display a sidebar using a built-in shortcode:
<pre><code>[pojo-sidebar id="ID"]
</code></pre>
Display a sidebar using a WordPress function:
<pre><code><?php dynamic_sidebar( 'pojo-sidebar-ID' ); ?>
</code></pre>
Would you like to like to contribute to Pojo Sidebars? You are more than welcome to submit your requests on the <a href="https://github.com/pojome/pojo-sidebars/" rel="nofollow ugc">GitHub repo</a>. Also, if you have any notes about the code, please open a ticket on this issue tracker.

Pojo Sidebars

Pojo Sidebars generates as many sidebars as you need. It then allows you to place them on any Post, Page or Custom Posts Type in your WordPress site.

Dynamically Dynamic Sidebar vs Pojo Sidebars