Bower
A package manager for the web, created at Twitter
Stencil
A Web Component compiler for building fast, reusable UI components and Progressive Web Apps 💎 Built by the Ionic Framework team
Browser Sync
Keep multiple browsers & devices in sync when building websites. http://browsersync.io
Chai
BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
Casper JS
Navigation scripting & testing utility for PhantomJS and SlimerJS
Gremlins.js
Monkey testing library for web apps and Node.js
Hotel
Start apps from your browser and get local domains without editing /etc/hosts http://i.imgur.com/DrLjbIi.gif
Ar.js
Image tracking, Location Based AR, Marker tracking. All on the Web.
Yeoman
Yeoman - a set of tools for automating development workflow
Qunit
An easy-to-use JavaScript Unit Testing framework.
Framer
Modern Prototyping Tool
Holder
Holder renders image placeholders entirely on the client side.
Shipit
Universal automation and deployment tool written in JavaScript.
Intern
A next-generation code testing stack for JavaScript.
Phantom Css
Visual/CSS regression testing with PhantomJS
Broccoli
Browser compilation library – a build tool for applications that run in the browser
Csscomb.js
CSS coding style formatter