This plugin will integrate AJAX commenting feature into your WordPress Blog. It uses the powerful JavaScript Framework jQuery to handle AJAX requests and jQuery Validation plugin by bassitance.de to validate comment form on the client side.
<h4>Feature Summary</h4>
<ul>
<li>Enable AJAX Commenting</li>
<li>Client Side Form Validation</li>
<li>Easily rolls back if JS disabled</li>
<li>Easily configure custom styles for messages</li>
</ul>
<a href="http://webdeveloperplus.com/wordpress/new-wordpress-plugin-wdp-ajax-comments/" rel="nofollow ugc">See plugin page for more details</a>

WDP AJAX Comments

This plugin will enable AJAX comment posting on your WordPress blog.

Justin Tadlock

Ptah Dunbar

Patrick Daly

DevPress

The Slideshow plugin gives you a shortcode called <code>[slideshow]</code>, which pulls any image attachments for a post (or any post type) and formats them into a nicely-designed slideshow.
The Slideshow plugin was originally developed as a feature of the <a href="http://devpress.com/themes/news" title="News WordPress theme" rel="nofollow ugc">News theme</a> (if you’re using that theme, please don’t install this plugin). Realizing that users sometimes switch themes, we wanted to give those users a way to continue using their slideshows with other themes. This also allows us to make the slideshow feature something that anyone can use, even if they’re not using one of our themes.

Slideshow

A shortcode for displaying a slideshow of image attachments for a post.

WDP AJAX Comments vs Slideshow