fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as recursive mkdir, copy, and remove.

Promisified graceful-fs

Babel compiler core.

Easily exclude node_modules in Webpack bundle

writable stream that concatenates strings or binary data and calls a callback with the result

the most correct and second fastest glob implementation in JavaScript

the definitive JavaScript type testing library

Use webpack with karma

A lightweight Promises/A+ and when() implementation, plus other async goodies.