Cacher is the code snippet organizer for pro developers

A collection of scrolling frameworks and libraries

http://www.hongkiat.com/blog/scrolling-effects-js-libraries/

http://scrollmagic.io/

example : http://alfredservice.com/

some more collection of frondend libraries https://getflywheel.com/layout/javascript-frameworks-libraries-2017/

for mobile experince http://xscroll.github.io/