npm/npm-registry-client

writable stream that concatenates strings or binary data and calls a callback with the result

A drop-in replacement for fs, making various improvements.

Run a function exactly one time

Simplified HTTP request client.

Abstraction for exponential and custom retry strategies for failed operations.

Safer Node.js Buffer API

The semantic version parser used by npm.

A flow control lib small enough to fit on in a slide presentation. Derived live at Oak.JS

HTTP server mocking and expectations library for Node.js

Node.js Streams, a user-land copy of the stream library from Node.js

A simple mock injector compatible needing no instrumentation in the libraries being tested

A deep deletion module for node (like `rm -rf`)

JavaScript Standard Style

A Test-Anything-Protocol library for JavaScript

Normalizes data that can be found in package.json files.

Parse the things that can be arguments to `npm install`

Standard Subresource Integrity library -- parses, serializes, generates, and verifies integrity metadata according to the SRI spec.