es-iterator-helpers
An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.
interactjs
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE9+)
filepond
FilePond, Where files go to stretch their bits.
@syncfusion/ej2-base
A common package of Essential JS 2 base libraries, methods and class definitions