Notable libraries to enrich your content visually and create delightful animations
Popmotion is a tiny animator's toolbox supports keyframe and spring animations for numbers, colors and complex strings.
Typed.js is a library that types. Enter in any string, and watch it type at the speed you've set, backspace what it's typed, and begin a new sentence for however many strings you've set.
Lottie is a mobile library that parses Adobe After Effects animations exported as json with Bodymovin and renders them on Web, Android, iOS, and React Native.
Velocity is an animation engine with the same API as jQuery's $.animate(). It works with and without jQuery. It's incredibly fast, and it features color animation, transforms, loops, easings, SVG support, and scrolling. It is the best of jQuery and CSS transitions combined.
Green Sock Animation Platform (GSAP) provides a fairly robust library that has animations for almost any type of effect your project could need.