yargs the modern, pirate-themed, successor to optimist.
A querystring parser that supports nesting and arrays, with a depth limit
Streams3, a user-land copy of the stream library from Node.js
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
get colors in your node.js console
The official MongoDB driver for Node.js
Promise based HTTP client for the browser and node.js
the complete solution for node.js command-line programs
fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as mkdir -p, cp -r, and rm -rf.