Tools mentioned the most in "Other" answer.
📦🐈 Fast, reliable, and secure dependency management.
Fast front-end web app build tool with simple declarative config, seamless incremental compilation for rapid development, an opinionated pipeline and workflow, and core support for source maps.
Browser compilation library – an asset pipeline for applications that run in the browser
Package management CLI
A blazing fast js bundler/loader with a comprehensive API
Meteor, the JavaScript App Platform
Babel is a compiler for writing next generation JavaScript.
The streaming build system
Dynamic ES module loader
Gets JavaScript
Main libraries usage (defined as number of “have used before and would use again” answers) compared to "Other" answers.