Yarn : Fast, reliable, and secure dependency management tool for javascript.
Snyk : Snyk helps you use open source and stay secure.
Continuously find & fix vulnerabilities in your dependencies.
DOM Monster Bookmarklet : DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of ...
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...
Babel : Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
A tool for managing JavaScript projects with multiple packages.