Vorlonjs
A new, open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io
Jquery Mockjax
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Jscritic
Quickly check how well 3rd party script behaves.
Apitizer
API mocking for client JavaScript applications
Monitor.io
remote monitoring and debugging for socket.io
Screenlog.js
Bring console.log on the screen
Thrill
Runs tests in many browsers.
Should.js
BDD style assertions for node.js -- test framework agnostic
Wire
A light, fast, flexible Javascript IOC container
Xv
:x: :heavy_check_mark: A beautifully simple and capable test runner
Mimosa
A lightning-fast, modular, next generation browser development tool.
Tlapse
📷 Create a timelapse of your web development... or just automatically take screenshots of your hard work ;)
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.
Yeoman
Yeoman - a set of tools for automating development workflow
Holder
Holder renders image placeholders entirely on the client side.
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
Phantom Css
Visual/CSS regression testing with PhantomJS