That's a really great question. So, if we talk about meta modules as a modules that adds missing features to an established language, I simply can't miss Lodash.

Lodash doesn't need introduction. The library is packed with tons of helper functions, currently missing from the ECMAScript Spec or extending the native ones. I hardly imagine a project that won't benefit from it.

Ramda is another example of a library worth mentioning. It's a library aimed at providing functional programming style in JavaScript, just how we need it.

For some time now, I've been using pretty-error for logging Node.js errors. It's a small tool for showing errors with less clutter. Just look at it: