dwhitevisoft

WP Markdown Syntax Sugar work in conjunction with plugins such as <a href="https://wordpress.org/extend/plugins/wp-markdown/" rel="ugc">wp-markdown</a> 
and <a href="https://wordpress.org/extend/plugins/wp-highlightjs/" rel="ugc">wp-highlight.js</a>. Markdown is fantastic markup for easily 
writing blogs, and <a href="http://softwaremaniacs.org/soft/highlight/en/" rel="nofollow ugc">highlight.js</a> is an extremely easy way to highlight 
code examples. In most cases, highlight.js automatically detects the proper language for a block of code. In certain 
cases, primarily if your code example is short, highlight.js could improperly detect the language that you are using; 
that is where this plugin comes into play. By adding one line to your code blocks, you can explicitly set the language 
that you are using, allowing highlight.js to properly format your code.
The concept is inspired by the <a href="https://github.com/spjwebster/wp-markdown-syntax-highlight" rel="nofollow ugc">wp-markdown-syntax-highlight</a> 
plugin.
The usage is extremely simple. Just add a shebang as the first line of your code example with the language you are using.
<pre><code>#!ruby
class Foo < Bar
 def hello
 puts "Hello World!"
 end
end
</code></pre>
The shebang is removed, and the code is outputted as:
<pre><code><pre><code class="language-ruby">class Foo < Bar
 def hello
 puts "Hello World!"
 end
end</code></pre>
</code></pre>
Now the code block is properly formatted for highlight.js to do its magic, and the code snippet will be properly 
highlighted.

WP-Markdown-Syntax-Sugar

WP Markdown Syntax Sugar is a simple plugin that works in conjunction with Markdown code blocks and highlight.js to properly format code.

JHoppe

Damn simple [markdown]#via shortcode[/markdown] for wordpress. 
This plugin uses <a href="http://parsedown.org/" rel="nofollow ugc">parsedown</a> and <a href="http://highlightjs.org" rel="nofollow ugc">highlight.js</a>. Zero configuration.
Write this into the editor:
<pre><code>[markdown] 
#h1
</code></pre>
<h3>h2</h3>
<pre><code>text 
____source code (two ore more underscores will be replaced by empty spaces) 
____source code (two ore more underscores will be replaced by empty spaces) 

 `javascript
source code
 `
[/markdown]
</code></pre>
and the shortcode content will be parsed with parsedown. Syntax highlighting will appear for the source codes.
This plugin is available at <a href="https://github.com/JohannesHoppe/markdown-shortcode" rel="nofollow ugc">github</a>, too. 
Please report issues at github, pull requests are welcome, too!

Markdown Shortcode

Damn simple markdown for wordpress via shortcode, uses parsedown (parsedown.org) and highlight.js (highlightjs.org).

WP-Markdown-Syntax-Sugar vs Markdown Shortcode