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.
Higher-order functions and common patterns for asynchronous code
the complete solution for node.js command-line programs
A library for promises (CommonJS/Promises/A,B,D)
A logger for just about everything.
Streams3, a user-land copy of the stream library from Node.js
yargs the modern, pirate-themed, successor to optimist.
A tiny wrapper around Node.js streams.Transform (Streams2/3) to avoid explicit subclassing noise