PhantomJS : PhantomJS is a headless WebKit with JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas...
tracing-framework : Rich tools for instrumenting, analyzing, and visualizing web apps.
Babel : Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
TagUI : TagUI is a general purpose tool for automating web interactions