basicScroll is a standalone parallax scrolling library with CSS variables inspired by skrollr. basicScroll lets you to change CSS variables depending on the scroll position.
Progress Nav is an animated progress bar that highlights sections of a page that are currently in view.
MiniRefresh is a graceful HTML5 drop-down refresh plugin. No dependency, high performance, multi themes support and easy to expand.
Alton is a jQuery-powered scrolling plugin that utilizes custom vertical scrolling effects in order to present and navigate through web content in a unique manner.
Fixit jQuery plugin can be used to fix the element at a certain position when the webpage is scrolled and the element is to be hidden, so that the element stay visible on the webpage.