
WebGazer.js: Webcam eye tracking
WebGazer.js is an eye tracking library which tracks eye position relative to the screen.

Popmotion.js: Animation engine
Popmotion.js is a great animation engine/library that supports tweening, svg morphing, svg drawing, element staggering and support for three.js.

Popper.js: Tooltip library
Popper.js is a tooltip library that allows you to build spatially aware tooltips with programmable boundaries.

ProgressBar.js: SVG progress bars
ProgressBar.js allows you to create and animate responsive SVG progress bars.

Push.js: Desktop push notifications
Push.js is a push notification library for all modern browsers with graceful fallbacks for older unsupported browsers.

RandomColor.js: Color generator
RandomColor.js is a random color generator which generates only brighter, more visually pleasing colors.

Rellax.js: Parallax scrolling
Rellax.js is a lightweight parallax scrolling library for desktop browsers.

ScrollTrigger.js: Animate on scroll
ScrollTrigger.js fires animations on HTML elements as you scroll via CSS classes.

Shepherd.js: Guided notifications
Shepherd.js guides users through your web application with programmable steps and instructions.

SnapSVG.js: SVG animation library
SnapSVG.js is a creative SVG animation library that allows you to add motion and life to SVG's.

Socialite.js: Social sharing buttons
Socialite.js is a library for adding asynchronous social buttons.

Spin.js: Customizable loader animation
Spin.js creates efficient loader animations on the fly with HTML and CSS keyframes.

Starability.css: Star ratings
Starability.css is an accessible star rating library with optional CSS animations.

SweetAlert.js: Alert replacement
SweetAlert.js is a refreshing take on the default browser alert window.

SweetAlert2.js: Alert replacement
SweetAlert2.js is a supported fork of the original SweetAlert.js. SweetAlert.js is a refreshing take on the default browser alert window.