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.
Lodash modular utilities.
yargs the modern, pirate-themed, successor to optimist.
Streams3, a user-land copy of the stream library from Node.js
the complete solution for node.js command-line programs
small debugging utility
Tiny millisecond conversion utility
The official MongoDB driver for Node.js