Draggable is a lightweight, responsive, modern drag & drop library - with a neat landing site you can play with. Built by Shopify, it starts small and lets you build it up to what you need. "At its most basic, Draggable gives you drag & drop functionality, fast DOM reordering, accessible markup, and a bundle of events to grab on to." If you need help understanding what Draggable does, go play with the website. Plus, take notes on how to make an awesome, interactive website. Good job, Draggable.