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.

Sharaz Shahid

Code Widget is simple widget allows you to insert any arbitrary Text/HTML and run PHP Code or Short Code. This Widget parses PHP code into simple text and much more.
Only users with the unfiltered_html role will be allowed to insert unfiltered HTML. This includes PHP code, so users without admin or editor permissions will not be able to use this to execute code, even if they have widget editing permissions. 
This plugin is developed and maintained by <a href="https://twitter.com/sharazghouri1" rel="nofollow ugc">Sharaz Shahid</a>

Code Widget

Code widget help  to  add  Short Code, PHP Code, HTML, and Simple Text in widget.

Slick Slideshow vs Code Widget