Blackbam

Slick Slideshow is a highly customizable, but easy-to-use JQuery Slideshow Plugin, to show dynamic images or contents on your website. 
Visit the <a href="http://www.blackbam.at/blackbams-blog/slick-slideshow" rel="nofollow ugc">Plugin Page</a> to see it in action.
Inspired by a tutorial from <a href="http://sixrevisions.com/tutorials/javascript_tutorial/create-a-slick-and-accessible-slideshow-using-jquery/" rel="nofollow ugc">sixrevisions.com</a>, we adapted the 
extended work from <a href="http://blog.monnet-usa.com/?p=276" rel="nofollow ugc">Blog Monnet USA</a>. Our part was finally to create a WordPress-Plugin from that.
Features:
<ul>
<li>All Styles, Animation Parameters and Contents are customizable easily over the backend</li>
<li>Can use Image URLs (unexperienced users) or custom HTML (experienced Users)</li>
<li>Valid XHTML 1.0 Strict, Valid CSS 2</li>
<li>Compatibility to other JQuery WordPress Plugins (you can use a Lightbox like Colorbox for example for images in the Slideshow)</li>
<li>Fast and efficient</li>
<li>Does not require extra-tables in your database (actually this might be required one day, but currently everything works fine)</li>
<li>GPLv2 licensed as it is a requirement of the WordPress Codex (donations for the efforts and further development are fair and welcome)</li>
<li>Languages: English, German</li>
</ul>
<h3>Known issues</h3>
<ul>
<li>The Plugin is not tested in combination with the use of other Javascript-Frameworks than jQuery (like Prototype). There might obviously be compability issues.</li>
</ul>

Slick Slideshow

Slick Slideshow is a highly customizable, but easy-to-use JQuery Slideshow Plugin, to show dynamic images or contents on your website.

Arno Esterhuizen

When you add text to the category description textarea and save the category, WordPress runs content filters that strips out all but the most basic formatting tags.
This plugin disables those filters for roles with the necessary permissions. Any html code you add to the category description will not be stripped out.
This plugin does not do anything other than disable the filters. It does not protect you from entering invalid HTML, nor does it help you create WYSIWYG HTML. You can use the post or page composing screen to help you create the text and formatting. Switch to the ‘code’ tab and copy the HTML code into the category description field.

Allow HTML in Category Descriptions

Great Plugin

This plugin allows you to use unfiltered HTML in your category descriptions by disabling selected WordPress filters.

Slick Slideshow vs Allow HTML in Category Descriptions