Yarn
Fast, reliable, and secure dependency management.
Nock
HTTP mocking and expectations library
Casper JS
Navigation scripting & testing utility for PhantomJS and SlimerJS
Grunt
Grunt: The JavaScript Task Runner
Spa Eye
Backbone debugger for Firefox
Phantom Css
Visual/CSS regression testing with PhantomJS
Should.js
BDD style assertions for node.js -- test framework agnostic
Jasmine
DOM-less simple JavaScript testing framework
Framer
Modern Prototyping Tool
Pioneer
Integration Testing
JSHint
JSHint is a community-driven tool to detect errors in JavaScript code and enforce your team's coding conventions.
Headstart
An automated front-end setup
Angular Debaser
Just a better way to test AngularJS apps.
Csscritic
A lightweight framework for regression testing of Cascading Style Sheets
Protractor
E2E test framework for Angular apps
Gulp
The streaming build system
Testcafe
A Node.js tool to automate end-to-end web testing.