Plugins/Syntax Highlighting - WordPress Codex
Chili + Enzymes (http://noteslog.com/post/chili-enzymes/)
Combine the Chili Code Highlighter and the Enzymes WordPress plugin to show your code snippets inside a post, a page, and everywhere in a theme. Chili is based on jQuery (http://jquery.com/)
CoolCode (http://www.coolcode.cn/?p=26)
Adds syntax highlighting and line number to your code, base on Text_Highlighter.
Code Viewer (http://elasticdog.com/2004/09/code-viewer/)
Pulls source code from an external file and displays it, optionally adding a link to download the code directly. It displays the code with proper indentation, line numbers, and automatic long-line wrapping.
Code Viewer ver1.4 (http://www.familjencarlstrom.se/WordPress/?p=141)
Works well with a WYSIWYG-editor. Pulls source code from an external file and displays it, optionally adding a link to download the code directly. It displays the code with proper indentation, line numbers, and automatic long-line wrapping. Handles parameter as lines and scroll. Highlight the syntax of the code using the GeSHi Library.
Google Code Prettify for wordpress (http://www.deanlee.cn/wordpress/google-code-prettify-for-wordpress/)
This small wordpress plugin enable syntax highlighting of code snippets in your post using Google Code Prettify (http://code.google.com/p/google-code-prettify/).
Dean's Source Code syntax highlighting (http://www.deanlee.cn/wordpress/code_highlighter_plugin_for_wordpress/)
This plugin using Geshi to highlight source code in a wide range of popular languages,along with pretty output.It's Easy to use,and can auto adjust the height of the Code Container if the code is too big.
Flash Text Formatter (http://flashtexteditor.com/ftf/)
Flash Text Formatter can format the text according to keyword definition list stored in external XML file. It uses Flash to format and display the code.
Google Syntax Highlighter for WordPress (http://wordpress.org/extend/plugins/google-syntax-highlighter/)
This plugin easily integrates the Google Syntax Highlighter (http://code.google.com/p/syntaxhighlighter/) into WordPress and enjoys wide language support.
HiGhlight (http://www.linksback.org/wordpress/wordpress-plugins/wphighlight-wordpress-plugin/)
Highlights search terms and keywords used to get to your site from the major search engines!
iG:Syntax Hiliter (http://blog.igeek.info/wp-plugins/igsyntax-hiliter/)
Highlight the syntax of the code in your posts using the GeSHi Library, be it HTML, CSS, ASP, PHP, JAVA or SQL. You just use the appropriate tags & bingo, your code becomes pretty. Released under GPL, this plugin has a spiffy admin interface to set various options & allows plain-text view for all published code!!
PHPizer (http://daryl.learnhouston.com/index.php?cat=21)
Syntax-highlights PHP code wrapped in appropriate marker tags. Additionally, allows you to specify CSS class to wrap around any code blocks.
Quick & Dirty PHP Source Printer (http://guff.szub.net/quick-and-dirty-phpsource-printer)
Not a plugin per se, this PHP script provides a fast and easy way to display the source of a plugin, with syntax-highlighted code and optional line numbering.
SimpleCode (http://www.village-idiot.org/archives/2006/04/09/wp-simplecode/)
Based on Dan Cederholm’s script of the same name, SimpleCode for WordPress provides a tab in the admin area for processing standard HTML markup for use as code examples.
Simple Syntax Highlighter (http://www.devel.narrabilis.com/posts/5)
Yes! - it has returned. Simple Syntax Highlighter is activated with a [syntax,filename,language] tag in a post or a page. It pulls file filename from your code folder, applies syntax highlighting for language language, and inserts the highlighted file into your post. It also provides a direct download link to the original code. This plugin is all-PHP with no javascript. This plugin uses PHP Geshi (http://qbnz.com/highlighter/index.php), so it can highlight any language that Geshi does. This plugin is really fast and easy to use, so try it.
Syntax Highlighting plugin (http://scott.yang.id.au/2004/05/syntax-hilight-enscript/)
using GNU Enscript (http://people.ssh.fi/mtr/genscript/) as backend.
SyntHihol (http://www.indyjt.com/software/synthihol/SyntHihol.zip)
Uses the php Geshi (http://qbnz.com/highlighter/) library to do syntax highlighting and works with any language Geshi supports, < 15 lines of code for the plugin.
Vim Color (http://dev.wp-plugins.org/wiki/vimcolor)
The vimcolor module highlights code in many different formats. VIM is a common programmers text editor for (usually) unix based systems. Out of the box VIM can color the syntax of 200+ languages including PHP, Perl, C, HTML, Fortran, Haskell, Java, etc.
Wordpress Code Highlight Plugin (http://www.chroder.com/archives/2005/04/16/wordpress-code-highlight-plugin/)
Uses the text_highlighter (http://pear.php.net/package/Text_Highlighter/) PEAR package. Comes with PEAR code for those hosting environments without this PEAR package installed.
WP-Syntax (http://wordpress.org/extend/plugins/wp-syntax/)
WP-Syntax provides clean syntax highlighting using GeSHi (http://qbnz.com/highlighter/) -- 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.