karevn

This plugin adds simple HTML tag generation API to WordPress, like these examples: 
 generates and prints <code><img src="/wp-content/<your-theme>/images/wordpress.png" alt="Wordpress" /></code>. 
 ‘my-image’)) ?> generates and returns almost the same tag, just with absolute url, id and alt attributes set manually. 
 term_id) ?> generates select tag with options taken from WP ‘category’ taxonomy and sets $term as selected item 
 rails-like “cycle” that returns “odd” on first call, “even” on second, “odd” on 
 third call, so on. reset_cycle resets the cycle. 
 shortcut for echo(get_post_meta($id, ‘meta_name’, true))
Form field generators for <code>text</code>, <code>checkbox</code>, <code>hidden</code> input types, <code>textarea</code>, and more tags. More docs coming soon, you can read the code to figure out other features for now.

HTML Helpers

This plugin adds simple HTML tag generation API to WordPress.

jtgraphic

Do you ever have a really hard getting your code formatted correctly in a post? Or do you ever have issues preserving tabs?
Plum Code Box makes it easy to insert and manage code blocks using the Chili javascript syntax highlighter. The plugin adds option boxes to post and page 
editors. There are also other <a href="http://codeplum.com/wordpress-plugins/" rel="nofollow ugc">WordPress Plugins</a> available from Code Plum.
Twitter: @codeplum
Website: http://codeplum.com
<h3>Donations</h3>
You may make donations at http://www.codeplum.com

Plum Code Box

Plum Code Box makes it easy to insert and manage code blocks using the Chili javascript syntax highlighter.

HTML Helpers vs Plum Code Box