Tiny, fast, and elegant implementation of core jQuery designed specifically for the server
Streams3, a user-land copy of the stream library from Node.js
Parse, validate, manipulate, and display dates
Higher-order functions and common patterns for asynchronous code
simple, flexible, fun test framework
A library for promises (CommonJS/Promises/A,B,D)
fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as mkdir -p, cp -r, and rm -rf.