Slideshow you can see there is from widgetkit along with our theme template called encounters.You can place shortcode generated from widgit kit plugin on to the Showcase header sidebar , placing shortcode on to the text widgets.
You can take this flat responsive tutorial for building slider on ecounters as well. Please find the vertical menu called “uses of widgitkit plugin” where all the procedure are illustrated.
You can find the attached screenshot of widgit kit slider set up on backend of the demo.
Let us know if you have any question regarding to this.