santerref

This plugin adds a new setting in the media gallery settings to set a custom CSS class.
The shortcode is updated with a new attribute “class”. A function alters the output of the gallery and wrap it with a new div with your custom class and the class “gallery-wrapper”.

Gallery Class

Gallery Class adds a new setting in the media gallery settings to set a custom CSS class.

nabtron

Wrapper for WordPress does a simple thing, adds a wrapper to your WrodPress.
Joomla comes with built-in wrapper which is missed in WordPress by many wordpress users.
Options in admin panel include:
<ul>
<li>desired url</li>
<li>select page on which wrapper has to be shown</li>
<li>height </li>
<li>width</li>
<li>show scroll bar or not</li>
<li>show border or not</li>
</ul>
Up coming version will have many more options
Found a bug or have a feature request ? <a href="https://nabtron.com/wp-wrapper/" rel="nofollow ugc"> 
Report here</a>

WP Wrapper

Wrapper for WordPress pages using iFrame. Various options in admin panel

Gallery Class vs WP Wrapper