Neil Mickelson

This plugin allows page authors to easily demonstrate shortcodes in their posts and pages by wrapping them inside a shortcode that does—well, nothing. It’s a NOOP.
<h3>Usage</h3>
Just wrap the shortcode you’re trying to demonstrate in enclosing [wrapper] shortcodes, like this:
<blockquote>
[wrapper][shortcode_example][/wrapper]
</blockquote>

SR-Wrapper

This plugin allows page authors to easily demonstrate shortcodes in their posts and pages by wrapping them inside a shortcode that does---well, nothin …

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.

SR-Wrapper vs Gallery Class