Spa Eye
Backbone debugger for Firefox
Yeoman
Yeoman - a set of tools for automating development workflow
Brjs
BladeRunnerJS (BRJS) is an open source development toolkit and framework for modular construction of large single-page HTML5 apps. It consists of a set of conventions, supporting tools and micro-libraries that make it easy to develop, test, deploy and maintain complex JavaScript apps.
Framer
Modern Prototyping Tool
Jasmine Ajax
jasmine-ajax - A library for faking Ajax responses in your Jasmine suite.
Gremlins.js
Monkey testing library for web apps and Node.js
Casper JS
Navigation scripting & testing utility for PhantomJS and SlimerJS
Jquery Mockjax
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Logerr
Playing with console errors, experimental project.
Pioneer
Integration Testing
Should.js
BDD style assertions for node.js -- test framework agnostic
Gulp
The streaming build system
Headstart
An automated front-end setup
Mimosa
A lightning-fast, modular, next generation browser development tool.
Phantom Css
Visual/CSS regression testing with PhantomJS
Quixote
CSS unit testing
Protractor
E2E test framework for Angular apps