Prettier : Prettier is an opinionated code formatter. It enforces a consistent style by parsing your code and re-printing it with its own rules that take the max...
Insight.io : Insight.io brings IDE-like code intelligence features such as cross-reference, class hierarchy and semantic search, right into your browser and helps ...
howdoi : Instant coding answers via the command line.
pkg : This command line interface enables you to package your Node.js project into an executable that can be run even on devices without Node.js installed.
Babel : Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
Beautify, unpack or deobfuscate JavaScript and HTML, make JSON/JSONP readable, etc.