The official MongoDB driver for 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.
Handlebars provides the power necessary to let you build semantic templates effectively with no frustration
A tiny wrapper around Node.js streams.Transform (Streams2/3) to avoid explicit subclassing noise
A logger for just about everything.
Lodash modular utilities.
Tiny millisecond conversion utility
Streams3, a user-land copy of the stream library from Node.js