th3mon

This plugin allows you to add pictures with rotator shortcode or directly in the source theme. Due to implementation 
of plug-ins for jQuery jcycle, you can set the transition effect to the next slide. 
You can also decide whether the plug is to load pictures randomly or not. For now, plug-in supports up to 10 photos. 
IF YOU LOAD MORE THAN THIS NUMBER WILL BE SKIPPED ALL THE PICTURES!
Requirements:
<ul>
<li>NextGen Gallery Plugin (https://wordpress.org/extend/plugins/nextgen-gallery/)</li>
</ul>

PS Rotator

Allows you to pick a gallery named as 'rotator' from the 'NextGen Gallery' plugin to use it as images rotator on your site.

samwilson

The Image Flicker plugin allows you to embed a changing image anywhere in your site. Rotate through a different banner advertisment every ten seconds, for example, or maybe have a little box in your sidebar that flicks through a selection of your best photographs. The speed at which the images flick is adjustable, as is the number of images. Each image can be linked to anywhere, and/or given a description which will appear with each image as it is flicked through.
Image display is determined by you: just change the style properties for the element <code>#image_flicker</code> in your stylesheet.

Image Flicker

Display a mini-slideshow anywhere on your site.  Good for banner advertisments or a looping display of your favorite photographs in the sidebar, etc.

PS Rotator vs Image Flicker