FilePane - Enhance the power of drag-and-drop on your Mac
Anime.js - Lightweight JavaScript animation library
Yoink - Yoink is a website that makes it easier to drag and drop images and text from one screen to another. It's a straightforward site with help along the way if you aren't sure about dragging and how to place your content.
Pixi.js - Fast lightweight 2D library that works across all devices
Dropover - Mac app for easier drag & drop
Substance - A JavaScript library for web-based content editing