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.
Generator Mcfly
A Yeoman generator for scaffolding an application using angular, browserify, ionic and famous
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.
Wire
A light, fast, flexible Javascript IOC container
Mimosa
A lightning-fast, modular, next generation browser development tool.
Treant Js
Treant.js - javascript library for drawing tree diagrams
Screenlog.js
Bring console.log on the screen
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.
Argon
An open-standards augmented reality platform for the web
Vorlonjs
A new, open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io
Apitizer
API mocking for client JavaScript applications
Holder
Holder renders image placeholders entirely on the client side.
Thrill
Runs tests in many browsers.
Monitor.io
remote monitoring and debugging for socket.io
Tlapse
📷 Create a timelapse of your web development... or just automatically take screenshots of your hard work ;)
Jscritic
Quickly check how well 3rd party script behaves.