WP Boilerplate Shortcode is a plugin for for those WordPress users wanting to define boilerplate text and/or boilerplate HTML and insert into their posts, pages and other custom post types.
WP Boilerplate Shortcode requires WordPress 3.0 or greater and it provides a "boilerplate" post type and a shortcode for inserting their content into posts, pages and custom post types.
You can learn more about it and download it at WordPress.org.