Pace
Automatically add a progress bar to your site. #hubspot-open-source
Animatelo
Animatelo is a bunch of cool, fun, and cross-browser animations for you to use in your projects. This is a porting to Web Animation API of the fabulous animate.css project.
Victor
A JavaScript 2D vector class with methods for common vector operations
Zoomooz
An easy-to-use jQuery plugin for making zooming web pages.
React Easy Flip
⚛ A React library for smooth FLIP animations. Easily animate originally unanimatable properties like DOM positions with one hook.
Cta.js
Animate your 'action-to-effect' paths
Sly
JavaScript library for one-directional scrolling with item based navigation support.
Imagehover.css
A Scaleable & Light Image Hover CSS Library
Flippant.js
A mini dependancy-less UI lib for flipping over DOM nodes.
Walkway
An easy way to animate SVG elements.
TweenJs
A simple but powerful tweening / animation library for Javascript. Part of the CreateJS suite of libraries.
Tilt.js
A tiny 60+fps parallax tilt hover effect for jQuery.
Elevator.js
Finally, a "back to top" button that behaves like a real elevator.
Animo.js
A powerful little tool for managing CSS animations
Anijs
Declarative handling library for CSS animations.
Transformicons
Transformicons: Animated icons, symbols and buttons using SVG and CSS. Inspired by the article from Sara Soueidan and the work of Bennett Feely.
Boron
A collection of dialog animations with React.js