XavinNydek

This plugin adds the ability to put a tag in your page entry and have it display a list of pages. By deafult it will 
show the subpages of the page that it is on, but it will accept any of the options the 
<a href="https://codex.wordpress.org/Template_Tags/wp_list_pages" rel="nofollow ugc"><code>wp_list_pages</code></a> template tag 
will except <code>title_li</code> and <code>echo</code>. It is very simple to use, just put <code>[xls]</code> in the entry for your page where you want the list to appear.
There is one option in addition to the <code>wp_list_pages</code> ones. Specifying a <code>css_class</code> will override the default of 
 xls_list for the class of the surrounding <code>ul</code>.
It supports multiple uses of the tag with different options on one page.
Here are a few examples of valid tags:
<pre><code>[xls depth=2]
</code></pre>
Shows two levels of the subpages of the current page.
<pre><code>[xls child_of=10 exclude="13, 15, 33"]
</code></pre>
Shows all children of the page with id 10, excluding pages 13, 15, and 33.
<pre><code>[xls child_of="0" show_date="modified"]
</code></pre>
Shows all pages, and shows the last modified date of each page.
Check the <a href="https://codex.wordpress.org/Template_Tags/wp_list_pages" rel="nofollow ugc"><code>wp_list_pages</code></a> documentation for all of the possible options.

Xavin's List Subpages

I know it hasn't been updated for some time but I have been using it for many years and currently running it on WordPress 4.3.1 without any issues.
Such a simple yet useful concept and this plugin does it well. Listing the sub pages of a page inside itself in a bullet list with a shortcode.



Still the best list subpages plugin

Adds a tag that you can use in your pages to display a list of it's subpages.

Steven

WP-Syntax provides clean syntax highlighting using 
<a href="http://qbnz.com/highlighter/" rel="nofollow ugc">GeSHi</a> — supporting a wide range of popular 
languages. It supports highlighting with or without line numbers and maintains formatting while copying snippets of code 
from the browser.
It avoids conflicts with other 3rd party plugins by running an early 
pre-filter and a late post-filter that substitutes and pulls the code snippets 
out first and then pushes them back in with highlighting at the end. The 
result is source code formatted and highlighted the way you intended.
Usage, Supported Languages, Styling Guidelines, and Release Notes are available 
in the <a href="https://wordpress.org/extend/plugins/wp-syntax/other_notes/" rel="ugc">Other Notes</a> section.
Want to contribute? WP-Syntax can be found on GitHub. <a href="https://github.com/shazahm1/WP-Syntax" rel="nofollow ugc">Fork and submit your pull requests today!</a>
<h4>Basic Usage</h4>
Wrap code blocks with <code><pre lang="LANGUAGE" line="1"></code> and <code></pre></code> where “LANGUAGE” 
is a <a href="http://qbnz.com/highlighter/" rel="nofollow ugc">GeSHi</a> supported language syntax. 
The <code>line</code> attribute is optional. <a href="https://wordpress.org/extend/plugins/wp-syntax/other_notes/" rel="ugc">More usage examples</a>
<h3>Usage</h3>
Wrap code blocks with <code><pre lang="LANGUAGE" line="1"></code> and <code></pre></code> where “LANGUAGE” is a <a href="http://qbnz.com/highlighter/" rel="nofollow ugc">GeSHi</a> supported 
language syntax. See below for a full list of supported languages. 
The <code>line</code> attribute is optional.
Example 1: PHP, no line numbers
<pre><code><pre lang="php">
<div id="foo">
<?php
 function foo() {
 echo "Hello World!\\n";
 }
?>
</div>
</pre>
</code></pre>
Example 2: Java, with line numbers
<pre><code><pre lang="java" line="1">
public class Hello {
 public static void main(String[] args) {
 System.out.println("Hello World!");
 }
}
</pre>
</code></pre>
Example 3: Ruby, with line numbers starting at 18
<pre><code><pre lang="ruby" line="18">
class Example
 def example(arg1)
 return "Hello: " + arg1.to_s
 end
end
</pre>
</code></pre>
Example 4: If your code already has html entities escaped, use <code>escaped="true"</code> as an option
<pre><code><pre lang="xml" escaped="true">
&lt;xml&gt;Hello&lt;/xml&gt;
</pre>
</code></pre>
Example 5: PHP, with line numbers and highlighting a specific line
<pre><code><pre lang="php" line="1" highlight="3">
<div id="foo">
<?php
 function foo() {
 echo "Hello World!\\n";
 }
?>
</div>
</pre>
</code></pre>
Example 6: PHP, with a caption (file and/or file path of the source file)
<pre><code><pre lang="php" src"https://github.com/shazahm1/Connections/blob/master/connections.php">
<div id="foo">
<?php
 function foo() {
 echo "Hello World!\\n";
 }
?>
</div>
</pre><h3>Supported Languages</h3>
</code></pre>
The following languages are most supported in the <code>lang</code> attribute:
abap, actionscript, actionscript3, ada, apache, applescript, apt_sources, asm, 
asp, autoit, avisynth, bash, bf, bibtex, blitzbasic, bnf, boo, c, 
c_mac, caddcl, cadlisp, cil, cfdg, cfm, cmake, cobol, cpp-qt, cpp, 
csharp, css, d, dcs, delphi, diff, div, dos, dot, eiffel, email, erlang, 
fo, fortran, freebasic, genero, gettext, glsl, gml, bnuplot, groovy, haskell, 
hq9plus, html4strict, idl, ini, inno, intercal, io, java, java5, 
javascript, kixtart, klonec, klonecpp, latex, lisp, locobasic, lolcode 
lotusformulas, lotusscript, lscript, lsl2, lua, m68k, make, matlab, mirc, 
modula3, mpasm, mxml, mysql, nsis, oberon2, objc, ocaml-brief, ocaml, 
oobas, oracle11, oracle8, pascal, per, pic16, pixelbender, perl, 
php-brief, php, plsql, povray, powershell, progress, prolog, properties, 
providex, python, qbasic, rails, rebol, reg, robots, ruby, sas, 
scala, scheme, scilab, sdlbasic, smalltalk, smarty, sql, tcl, teraterm, 
text, thinbasic, tsql, typoscript, vb, vbnet, verilog, vhdl, vim, 
visualfoxpro, visualprolog, whitespace, whois, winbatch, xml, xorg_conf, 
xpp, z80
See the <a href="http://qbnz.com/highlighter/geshi-doc.html" rel="nofollow ugc">GeSHi Documentation</a> 
for a full list of supported languages.
(Bold languages just highlight the more popular ones.)
<h3>Styling Guidelines</h3>
WP-Syntax colors code using the default GeSHi colors. It also uses inline 
styling to make sure that code highlights still work in RSS feeds. It uses a 
default <code>wp-syntax.css</code> stylesheet for basic layout. To customize your styling, 
copy the default <code>wp-content/plugins/wp-syntax/wp-syntax.css</code> to your theme’s 
template directory and modify it. If a file named <code>wp-syntax.css</code> exists in 
your theme’s template directory, this stylesheet is used instead of the default. 
This allows theme authors to add their own customizations as they see fit.
<h3>Advanced Customization</h3>
WP-Syntax supports a <code>wp_syntax_init_geshi</code> action hook to customize GeSHi 
initialization settings. Blog owners can handle the hook in a hand-made plugin 
or somewhere else like this:
<pre><code><?php
add_action('wp_syntax_init_geshi', 'my_custom_geshi_styles');

function my_custom_geshi_styles(&$geshi)
{
 $geshi->set_brackets_style('color: #000;');
 $geshi->set_keyword_group_style(1, 'color: #22f;');
}
?>
</code></pre>
This allows for a great possibility of different customizations. Be sure to 
review the <a href="http://qbnz.com/highlighter/geshi-doc.html" rel="nofollow ugc">GeSHi Documentation</a>.

WP-Syntax

WP-Syntax provides clean syntax highlighting for embedding source code within pages or posts.

Xavin's List Subpages vs WP-Syntax