"The next generation toolkit for Joomla and WordPress to enrich your website experience" - Yootheme
You can read about "Display Widgets" at Yootheme's homepage.http://yootheme.com/widgetkit/documentation/getting-started/display-widgets
A Widget could be a Gallery, Slideshow, Map, Slideset, Accordion, Twitter feed . . .
"The Widgetkit Slideshow is the ultimate image and content slideshow for Joomla and WordPress. It's flexible, easy to customize and completely built with HTML5 and CSS3."-Yootheme.