Framer
Modern Prototyping Tool
Blanket
blanket.js is a simple code coverage library for javascript. Designed to be easy to install and use, for both browser and nodejs.
Wire
A light, fast, flexible Javascript IOC container
Generator Mcfly
A Yeoman generator for scaffolding an application using angular, browserify, ionic and famous
Vorlonjs
A new, open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io
Hashgrid
A little tool that inserts a layout grid in web pages, allows you to hold it in place, and toggle between displaying it in the foreground or background.
Treant Js
Treant.js - javascript library for drawing tree diagrams
Argon
An open-standards augmented reality platform for the web
Apitizer
API mocking for client JavaScript applications
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.
Jscritic
Quickly check how well 3rd party script behaves.
Holder
Holder renders image placeholders entirely on the client side.
Monitor.io
remote monitoring and debugging for socket.io
Boomerang
End user oriented web performance testing and beaconing
Jquery Mockjax
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Yeoman
Yeoman - a set of tools for automating development workflow