The simply the best collection of scrolling scripts
A lightweight widget that allows you to react to the user's scroll. The header slides out of view when scrolling down and slides back in when scrolling up. It has a pure JS API, plus an optional jQuery/Zepto plugin and AngularJS directive.
gridscrolling.js takes care of layouting, by giving you a clear path thru the mains, and the easy option to dig in the asides if wanted. If no JS, degrades with style.
Websites that correctly use animation as you scroll down the page just feel pro. You can add AOS to your WordPress theme.