Nock
HTTP mocking and expectations library
Blanket
blanket.js is a simple code coverage library for javascript. Designed to be easy to install and use, for both browser and nodejs.
Vorlonjs
A new, open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io
Jscritic
Quickly check how well 3rd party script behaves.
Apitizer
API mocking for client JavaScript applications
Screenlog.js
Bring console.log on the screen
Thrill
Runs tests in many browsers.
Jquery Mockjax
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Phantom Css
Visual/CSS regression testing with PhantomJS
Monitor.io
remote monitoring and debugging for socket.io
Mimosa
A lightning-fast, modular, next generation browser development tool.
Generator Mcfly
A Yeoman generator for scaffolding an application using angular, browserify, ionic and famous
Yeoman
Yeoman - a set of tools for automating development workflow
Gremlins.js
Monkey testing library for web apps and Node.js
Xv
:x: :heavy_check_mark: A beautifully simple and capable test runner
Roughdraft.js
Quickly create an interactive HTML mock-up by auto sourcing lorem ipsum/images generators, with minimal html markup, and no server side code
Should.js
BDD style assertions for node.js -- test framework agnostic