Justin Tadlock

Quote This is yet another quote plugin. It has been a script I’ve used on my personal blog for a few years that I figured I’d share with the rest of the WordPress community.
Basically, it lets you show quotations on your blog in one of three ways:
<ul>
<li><code>quote_this()</code> template tag for your theme template files.</li>
<li><code>[quote-this]</code> shortcode for adding it to your posts and pages.</li>
<li>Quote This widget for use in widget areas.</li>
</ul>

Quote This

Allows the user to call random quotes with the quote_this() function, [quote-this] shortcode, or Quote This widget.

vicchi

This plugin allows you to refer to a WordPress shortcode within the content of posts and pages without that shortcode being automagically expanded by WordPress. The plugin takes advantage of the fact that the <a href="https://codex.wordpress.org/Shortcode_API" rel="nofollow ugc">WordPress ShortCode API</a> does not support nested shortcodes to allow this plugin’s shortcode to wrap the shortcode being documented.
<blockquote>
The shortcode parser uses a single pass on the post content. This means that if 
 the $content parameter of a shortcode handler contains another shortcode, it won’t 
 be parsed
</blockquote>
The plugin supports both the self closing <code>[shortcode]</code> and enclosing <code>[shortcode]content[/shortcode]</code> forms and supports a short form name of the shortcode, <code>[wp_scs]</code> as well as the more verbose <code>[wp_shortcode_shield]</code> form. For the sake of brevity, the remainder of this documentation will use the <code>[wp_scs]</code> short form name.
If using the self-closing form of the shortcode, you need to supply the name of the shortcode you are documenting using the <code>code</code> attribute but without using the enclosing <code>[</code> and <code>]</code> characters. This is because when parsing shortcodes, WordPress looks for the first occurrence of the ‘]’ character to terminate the shortcode. As a result of this, usage such as
<pre><code>[wp_scs code="[another-shortcode-name]"]
</code></pre>
… WordPress will use the ‘]’ character inside the <code>code</code> attribute to try and terminate the shortcode name, which is not what is desired. Instead, the plugin automagically adds the terminating ‘[‘ and ‘]’ characters to the plugin’s output, so that usage such as
<pre><code>[wp_scs code="another-shortcode-name"]
</code></pre>
… will display [another-shortcode-name] in your post’s of page’s content.
If you are using the enclosing form of the shortcode, you can either supply the shortcode to be documented with or without enclosing ‘[‘ and ‘]’ characters; if they are omitted, the plugin will add them for you, so that usage such as
<pre><code>[wp_scs][another-shortcode-name][/wp_scs]
</code></pre>
… and
<pre><code>[wp_scs]another-shortcode-name[/wp_scs]
</code></pre>
… will display the same results, namely [another-shortcode-name].
Finally a note of caution, you cannot mix the enclosing and self closing form of the plugin’s shortcode within the same post or page; this is not a limitation of the plugin, but the way in which WordPress implements the <a href="https://codex.wordpress.org/Shortcode_API" rel="nofollow ugc">ShortCode API</a> …
<blockquote>
The parser does not handle mixing of enclosing and non-enclosing forms of the same 
 shortcode as you would want it to. For example, if you have:
<code>[myshortcode example='non-enclosing' /] non-enclosed content [myshortcode] enclosed content 
 [/myshortcode]</code>
Instead of being treated as two shortcodes separated by the text ” non-enclosed content “, 
 the parser treats this as a single shortcode enclosing ” non-enclosed content [myshortcode] 
 enclosed content”.
</blockquote>

WP Shortcode Shield

Allows posts and pages to easily document WordPress shortcodes without the shortcode being expanded.

Quote This vs WP Shortcode Shield