Galen
Layout and functional testing framework for websites
Jscritic
Quickly check how well 3rd party script behaves.
Bower
A package manager for the web, created at Twitter
Apitizer
API mocking for client JavaScript applications
Thrill
Runs tests in many browsers.
Gremlins.js
Monkey testing library for web apps and Node.js
Screenlog.js
Bring console.log on the screen
Hotel
Start apps from your browser and get local domains without editing /etc/hosts http://i.imgur.com/DrLjbIi.gif
Framer
Modern Prototyping Tool
Xv
:x: :heavy_check_mark: A beautifully simple and capable test runner
Pioneer
Integration Testing
Vorlonjs
A new, open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io
Nock
HTTP mocking and expectations library
Generator Mcfly
A Yeoman generator for scaffolding an application using angular, browserify, ionic and famous
Monitor.io
remote monitoring and debugging for socket.io
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
Intern
A next-generation code testing stack for JavaScript.