Usage:
<pre> 
<code class=”python”> 
// Put your code here. 
</code> 
</pre>
Supported Code classes: 
PHP, Phyton, Java, Javascript, Delphi, Css, HTML, HTML+Django and more…
<h3>Arbitrary section</h3>
<h3>A brief Markdown Example</h3>

Dojox WordPress Syntax Highlighter

Free syntax highlighter written in Java Script as Wordpress Plugin.

leo108

This plugin not only provides you syntax-highlighter , but also add a textarea and a button in the post page . 
you just have to select the language , add code to the textarea and click the ‘OK’ button , and you will get 
your code highlighted in your atricle. 
这个插件不仅仅提供了代码高亮，还在编辑页面增加了一个代码框和一个按钮，你只要选择好你的代码语言，把代码贴入代码框， 
再点击一下OK按钮，你的带高亮的代码就会被插入到文章里去。
Supported Languge: 
 Bash 
 C 
 C++ 
 C# 
 CSS 
 Delphi 
 Diff 
 Erlang 
 Groovy 
 HTML 
 Java 
 Javascript 
 Perl 
 PHP 
 PowerShell 
 Python 
 Ruby 
 SQL 
 VisualBasic 
 VB.NET 
 XML

Syntax Highlighter++

You can add code with syntax highlighter easily when you are editing an article. 方便的代码高亮插件。

Dojox WordPress Syntax Highlighter vs Syntax Highlighter++