async Higher-order functions and common patterns for asynchronous code
chai BDD/TDD assertion library for node.js and the browser. Test framework agnostic.
formidable A node.js module for parsing form data, especially file uploads.
htify Externalize require definition in _XXXX.js or _default.js
http-proxy HTTP proxying for the masses
istanbul Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests
jade A clean, whitespace-sensitive template language for writing HTML
lodash The modern build of lodash modular utilities.
mocha simple, flexible, fun test framework
mongoose Mongoose MongoDB ODM
nodemailer Easy as cake e-mail sending from your Node.js applications
passport Simple, unobtrusive authentication for Node.js.
request Simplified HTTP request client.
should test framework agnostic BDD-style assertions
socket.io node.js realtime framework server
supertest Super-agent driven library for testing HTTP servers
validator String validation and sanitization
zombie Insanely fast, full-stack, headless browser testing using Node.js
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