daxitude

This plugin adds an advanced code editor to the post content box on post.php and post-new.php. A third tab is added alongside Visual and HTML modes and you can toggle between the three.
NOTE: Visual Mode tends to eat up most/all of any special formatting. If you want to use ACE I’d suggest disabling Visual mode completely. You can do this easily yourself under Users -> Your Profile -> ‘Disable the visual editor when writing’. You can also do it for all users and for specific post types only. See the accompanying file no-visual.php for an example.
Not all features work in Internet Explorer v8 and earlier.
This does not work in full screen mode. Yet.
<h4>Features</h4>
<ul>
<li>Syntax highlighting</li>
<li>Tabbing</li>
<li>Line numbers</li>
<li>Auto closing of tags and quotes</li>
<li>Line highlighting</li>
<li>Default theme is TextMate</li>
<li>Fixed-width, soft wrap, adjustable height</li>
<li>Remembers your last used mode and loads it up on initial page view</li>
</ul>
<a href="http://ace.ajax.org/" rel="nofollow ugc">ACE Editor</a> can do quite a bit more. If you have integration ideas, let me hear about it
<h3>Todo</h3>
<ul>
<li>make height of editor consistent when toggling between modes</li>
<li>deal with auto_p? (might help preserve formatting from Visual mode)</li>
<li>make it work in full screen mode</li>
<li>allow users to set their ACE preferences on their profile screen</li>
</ul>

ACE Editor for WP

Adds ACE Editor to the post content editor for syntax-highlighting and more

digihero

Auto SyntaxHighlighter is a WordPress Code highlight plugin.
It’s used alexgorbatchev SyntaxHighlighter JavaScript package.
Autoload SyntaxHighlighter only requisite js files and display you code.
Github address: https://github.com/wkii/Auto-SyntaxHighlighter
Support languages see: SyntaxHighlighter Brushes.
Full Support for : AppleScript, ActionScript3, Bash/shell, C#, C++, CSS, Delphi, Diff, Groovy, JavaScript, Java, Perl, PHP, Plain Text, Python, Ruby, Sass, Scala, SQL, Visual Basic and XML/HTML…
It’s advantages:
<ul>
<li>Don’t write database;</li>
<li>Don’t need settings;</li>
<li>Deactivate plugin code can also display properly;</li>
<li>Code can switch visual editing mode or HTML mode;</li>
<li>With the w3c standards;</li>
<li>Insert code small tools;</li>
<li>Automatic and only loading requisite files;</li>
<li>Write code to support non-administrator</li>
</ul>

Auto SyntaxHighlighter

Auto SyntaxHighlighter is a WordPress Code highlight plugin. Use editor botton, in the pop-up window, paste or write your code, oh, very simple.

ACE Editor for WP vs Auto SyntaxHighlighter