The semantic version parser used by npm.
the complete solution for node.js command-line programs
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.
yargs the modern, pirate-themed, successor to optimist.
fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as mkdir -p, cp -r, and rm -rf.
Simplified HTTP request client.
A logger for just about everything.
Higher-order functions and common patterns for asynchronous code
Tiny millisecond conversion utility
Recursively mkdir, like `mkdir -p`