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.

randexdev

This simple WordPress plugin adds support for the Swift Programming Language to the SyntaxHighlighter Evolved plugin. 
Requires SyntaxHighlighter Evolved plugin to be installed first.

SyntaxHighlighter Evolved: Swift Brush

Adds support for the Swift Programming Language to the SyntaxHighlighter Evolved plugin.

WP-SimpleSyntaxHighlighter vs SyntaxHighlighter Evolved: Swift Brush