Bamboo MCR

Bamboo Layout provides a number of shortcodes which enable more flexible content layout anywhere in a page or post.
Usage:
<pre><code>For multi-column layouts (up to nine columns is supported) use the following shortcodes:

[columns]
 [column]
 CONTENT GOES HERE
 [/column]
 [column]
 CONTENT GOES HERE
 [/columns]
[columns]

For dynamic, five column feature boxes use the following shortcodes:

 [features]
 [feature-box title="FEATURE TITLE GOES HERE"]
 FEATURE CONTENT GOES HERE
 [/feaure-box]
 [feature-box title="FEATURE TITLE GOES HERE"]
 FEATURE CONTENT GOES HERE
 [/feaure-box]
 [feature-box title="FEATURE TITLE GOES HERE"]
 FEATURE CONTENT GOES HERE
 [/feaure-box]
 [feature-box title="FEATURE TITLE GOES HERE"]
 FEATURE CONTENT GOES HERE
 [/feaure-box]
 [feature-box title="FEATURE TITLE GOES HERE"]
 FEATURE CONTENT GOES HERE
 [/feaure-box]
 [/features]
</code></pre>

Bamboo Layout

Provides a number of shortcodes to enable custom page layouts.

Jonathan Desrosiers

Linchpin

Aaron Ware

<blockquote>
Similar functionality has been developed for the <a href="https://developer.wordpress.org/themes/advanced-topics/customizer-api/" title="Theme Customizer API" rel="nofollow ugc">Theme Customizer API</a> and was <a href="https://make.wordpress.org/core/2016/01/28/previewing-site-responsiveness-in-the-customizer/" rel="nofollow ugc">merged into WordPress core as of version 4.5</a>. This plugin will automatically deactivate when you install WordPress 4.5.
</blockquote>
When viewing the front end of the site, a “Responsive” button is added to the WordPress Toolbar. Clicking that will toggle an overlay with your website presented in various sizes for easy responsive design testing.
This can be useful both during theme development, and when writing content to verify it will be presented properly.
This plugin is a heavily modified version of <a href="http://mattkersley.com/" title="Matt Kersley's" rel="nofollow ugc">Matt Kersley’s</a> <a href="http://github.com/mattkersley/Responsive-Design-Testing" title="Responsive Design Testing" rel="nofollow ugc">Responsive Design Testing</a>.

Responsive Page Tester

Gives users with content creating permissions the ability to preview their site in a responsive testbed.

Bamboo Layout vs Responsive Page Tester