Simple SyntaxHighlighter for WordPress adds Alex Gorbatchev’s JavaScript <a href="http://alexgorbatchev.com/wiki/SyntaxHighlighter" rel="nofollow ugc">SyntaxHighlighter</a> to your blog.
Alex Gorbatchev’s SyntaxHighlighter is a fully functional self-contained code syntax highlighter developed in JavaScript. To get an idea of what SyntaxHighlighter is capable of, have a look at the <a href="http://alexgorbatchev.com/wiki/SyntaxHighlighter:Demo" rel="nofollow ugc">demo page</a>.
The plugin itself only wraps this functionality and provides some basic configuration through the WordPress Admin panel.
Features:
<ul>
<li>Adds code syntax highlighting to blog</li>
<li>Includes syntax brushes for the following languages: ActionScript, BashShell, C/C++, C#, ColdFusion, CSS, Delphi/Pascal, Diff, Erlang, F#, Groovy, Java, JavaFX, JavaScript, Perl, PHP, Plain, PowerShell, Python, Ruby, Scala, SSIS Expressions, SQL, VB.net, and XML/HTML</li>
<li>Syntax brush availablity configurable by admin</li>
<li>Includes CSS Theme support</li>
</ul>

WP-SimpleSyntaxHighlighter

This plugin simply allows you to add and manage Alex Gorbatchev's JavaScript SyntaxHighlighter to your blog.

agmorpheus

Syntax Highlighter ComPress is a simple WordPress plugin, that is based on the latest <a href="http://alexgorbatchev.com/wiki/SyntaxHighlighter" rel="nofollow ugc">Alex Gorbatchev’s SyntaxHighlighter Script</a>. Code and source text of different mark-up or programming languages can be highlighted in WordPress.
There are other WordPress plugin based on the SyntaxHighlighter Script but these cause long page loading times and they are difficult to handle. The advantage of Syntax Highlighter ComPress is that only necessary brush files will be loaded dynamically. Another advantage is that your code can easily pasted into your posts, no need to replace all ‘<code><</code>‘ with ‘<code>&lt;</code>‘.
Supported mark-up or programming are: AppleScript, ActionScript3, Bash/shell, Coldfusion, C#, C++, CSS, Delphi, Diff, Erlang, Groovy, JavaScript, Java, JavaFX, Perl, PHP, Plain Text, Python, Ruby, Scala, SQL, Visual Basic and XML.
The plugin is localized in English, German and Romanian.

Syntax Highlighter Compress

Syntax Highlighter ComPress is a plugin for code syntax highlighting. It loads fast on the website and code can pasted easily into Wordpress.

WP-SimpleSyntaxHighlighter vs Syntax Highlighter Compress