vanilla-fade
VanillaJS implementation of the JQuery fade methods.
t-scroll
The t-scroll JavaScript library lets you apply more than 45 pretty cool animations to any elements when they appear in the viewport.
dom-fader
Plain JavaScript version of jQuery's fadeToggle(), fadeIn(), & fadeOut(), but without all the baggage.
aoejs
Animate On entrance (AOE) is a lightweight, dependency free, insanely fast scroll animation library built on top of Intersection Observer API