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...
Lerna : A tool for managing JavaScript projects with multiple packages.
Nx : Nx is a smart and extensible build framework to help you architect, test, and build at any scale — integrating seamlessly with modern technologies and...
A toolkit for React, Preact & Inferno apps, React libraries and other npm modules for the web, with no configuration (until you need it)