Mike Schinkel

This plugin provides a shortcode that when inserted will display the body from a referenced “boilerplate.” A boilerplate is a special post type defined by this plugin. References can be made by title, path or ID. Below is a list of shortcode attributes used by the boilerplate shortcode. Examples are given for hypothetical “Copyright” and “Payment Terms.” All attributes are optional except one of “byid“, “bypath” or “bytitle” must be specified:
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<li>
bytitle: The full case-sensitive title of the boilerplate, i.e. “Copyright” or “Payment Terms“
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<li>
bypath: The editable lowercase path for the boilerplate, i.e. “copyright” or “payment-terms” (vs. “/boilerplates/copyright/” or “/boilerplates/payment-terms/“)
</li>
<li>
byid: Refers to the internal ID from the wp_posts table for the boilerplate post, i.e. 234 or 1273
</li>
<li>
showtitle: “true” or “false” (defaults to “false“); if “true” boilerplate content will be prefixed with the title of the boilerplate as entered in the edit screen, or optionally with a “title” attribute you specify.
</li>
<li>
title: Use to override the displayed title of the boilerplate in specific cases. When “title” is specified “showtitle” is implicity set to “true.”
</li>
<li>
titletag: HTML element used to wrap the title when “showtitle” is explicity “true” or “title” is set (defaults to “h3.”)
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<li>
id: The HTML “id” attribute applied to the div element that wraps the boilerplate and it’s optional title. If not specificed the div will not get have an “id” set.
</li>
<li>
class: The HTML “class” attribute applied to the div& element that wraps the boilerplate and it’s optional title (defailts to “boilerplate.”)
</li>
</ul>

WP Boilerplate Shortcode

Provides a shortcode that when inserted will display the body from a referenced "boilerplate" post type.

peeping4dsun

A boilerplate plugin aimed at developers, that want easy AJAX access to WordPress metaboxes. After activating the plugin, the admin user will notice two buttons in metabox called ‘AJAX Data’. The purpose of this plugin are:
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Giving WordPress developers with an quick and common settings for accessing the native AJAX functionality of WordPress.
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<li>
Fixing the gap of old and overcomplecated methods for using AJAX in WordPress. </li>
<li>
Giving the newbie WordPress developers an easy way to develop AJAX plugins for WordPress. </li>
</ul>
The plugin by default sets this functionality only for WordPress’s backend, but the code can easily be manipulated to bring AJAX to the frontend, as well.

Ajax the metaboxes

A plugin that gives the Wordpress developer two sample buttons, that are already implementing the native Wordpress's AJAX functionallity

WP Boilerplate Shortcode vs Ajax the metaboxes