Supported npm modules (and their dependencies) from Top 500 most popular in https://www.npmjs.com:

• async: Higher-order functions and common patterns for asynchronous code.
• lodash: The modern build of lodash modular utilities.
• underscore: JavaScript's functional programming helper library.
• moment: Parse, validate, manipulate, and display dates.
• minimist: Parse argument options.
• validator: String validation and sanitization.
• marked: A markdown parser built for speed.
• handlebars: Handlebars provides the power necessary to let you build semantic templates effectively with no frustration.
• qs: A querystring parser that supports nesting and arrays, with a depth limit.
• string: String contains methods that aren't included in the vanilla JavaScript string such as escaping html, decoding html entities, stripping tags, etc.
• lru-cache: A cache object that deletes the least-recently-used items.
• esprima: ECMAScript parsing infrastructure for multipurpose analysis.
• express-validator: Express middleware for the validator module.
• routes: Minimalist route matching for JavaScript.
• sprintf Sprintf().
• clone: Deep cloning of objects and arrays.
• xtend: Xtend is a basic utility library which allows you to extend an object by appending all of the properties from each object in a list.
• crypto: JavaScript implementations of standard and secure cryptographic algorithms.
• extend: Port of jQuery.extend.
• rx: Library for composing asynchronous and event-based operations in JavaScript.
• ms: Tiny ms conversion utility.
• ramda: A practical functional library for JavaScript programmers.
• once: Run a function exactly one time.
• wrappy: Callback wrapping utility.
• bluebird: Full featured Promises/A+ implementation with exceptionally good performance.
• immutable: Immutable Data Collections.
• after: Tiny flow control.
• classnames: A simple utility for conditionally joining classNames together.
• sax: An evented streaming XML parser in JavaScript.
• punycode: A robust Punycode converter that fully complies to RFC 3492 and RFC 5891, and works on nearly all JavaScript platforms.
• querystring: Querystring module.
• url: This module has utilities for URL resolution and parsing.
• strftime: Strftime for JavaScript.
• numeral: Format and manipulate numbers.
• css: CSS parser / stringifier.
• he: A robust HTML entities encoder/decoder with full Unicode support.
• diff: A JavaScript text diff implementation.
• extended: Library for combining multiple libraries into one.
• is-extended: Module for type detection.
• object-extended: Additional object extensions with a chainable api.
• string-extended: Additional string extensions with a chainable api.