chrisguitarguy

Arbitrary Sidebars allows you to add widget areas via an page in the WordPress admin area. What you do with those sidebars on the front end is up to you and your theme.
This plugin requires PHP 5.3+. Please check your server configuration before installing.
Some use case ideas:
<ul>
<li>The end user wants to associate sidebars with individual posts and pages. This plugin ould provide half that functionality: easily creating widget areas.</li>
<li>You need reusable content blocks and want to take advantage of the widget system.</li>
</ul>

Arbitrary Sidebars

Trevor Anderson

Split sidebars and widget areas into responsive columns.
Two simple widgets are provided, “Layout: New Column” and “Layout: New Column on New Row”.
Simply place these in your widget area where you’d like to create a new column (split) or new row of columns.
Gutter size and responsive collapse options are available in the Customizer -> Widget Columns panel.

Tuxedo Responsive Widget Columns

Just tested this plugin, and it works exactly as I hoped for. I can now have complex layouts in any widget areas. 
Of course it's best used for horizontal widget areas like footers, etc...



Works perfectly!

Split sidebars and widget areas into responsive columns.

Arbitrary Sidebars vs Tuxedo Responsive Widget Columns