Trace Kit
Attempts to create stack traces for unhandled JavaScript exceptions in all major browsers.
Galen
Layout and functional testing framework for websites
Wire
A light, fast, flexible Javascript IOC container
Broccoli
Browser compilation library – a build tool for applications that run in the browser
Screenlog.js
Bring console.log on the screen
Apitizer
API mocking for client JavaScript applications
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.
Punch
A fun and easy way to build modern websites
Generator Mcfly
A Yeoman generator for scaffolding an application using angular, browserify, ionic and famous
Rulers Guides.js
Creates Photoshop-like guides and rulers interface on a web page
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.
Thrill
Runs tests in many browsers.
Yeoman
Yeoman - a set of tools for automating development workflow
Platform
Reactive libraries for Angular
Monitor.io
remote monitoring and debugging for socket.io