Trace Kit
Attempts to create stack traces for unhandled JavaScript exceptions in all major browsers.
Galen
Layout and functional testing framework for websites
Boomerang
End user oriented web performance testing and beaconing
Punch
A fun and easy way to build modern websites
Wire
A light, fast, flexible Javascript IOC container
Broccoli
Browser compilation library – a build tool for applications that run in the browser
Apitizer
API mocking for client JavaScript applications
Screenlog.js
Bring console.log on the screen
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.
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