Ederson Peka

With this plugin, you can create as much “sidebars” (widget areas) as you need, and assign them in a per-page basis. (It’s only useful if your theme supports “sidebars”.)
WARNING: Updating from versions prior to 0.2.5 requires new set up.

Unlimited Page Sidebars

This plugin does exactly what it needs to and always works. It's great.

Does exactly what it needs to!

Assign one specific widget area (sidebar) to each page.

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.

Unlimited Page Sidebars vs Pojo Sidebars