Flickity - touch enabled and responsive gallery
Do you like lodash.js or underscore.js ? Then in PHP you definitely need to use bottomline. A set of utility functions to work with arrays, collections and strings.
Flickity - touch enabled and responsive gallery
Waypoints is a JS library that makes it easy to execute a function whenever you scroll to an element.
snabbt.js - minimalistic animation library in JavaScript
Chartspree.io - kind a Lorem Ipsum charts. Allow to insert chart as image src.
Hover.css - a great collection of CSS3 powered hover effects to be applied to links, buttons, logos, SVG, featured images and so on.