The Scroll Triggered Popup extension is the ultimate tool to help you show eye catching acceptable popups. This is a perfect option for all the devices possible.
Custom Scrollbar for WordPress – Scroller 2.0.1 The Scroller WordPress Plugin is a beautiful scrollbar for any scrollable element or a whole WordPress page. The Scroller is explicitly designed to customize the scrollbar on your WordPress site
Sticky Header on Scroll is a super easy way to add a scroll-then-fix header to your WordPress website
ScrollMe - scroll of elements v1.0 ScrollMe is a wordpress plugin for adding simple scrolling effects to web pages. As you scroll down the page ScrollMe can scale, rotate, translate and change the opacity of elements on the page.