1. Express

Express is one of the most used NodeJS libraries that can be downloaded from the NPM repository.

2. Socket.io

You may always use Socket NodeJS Library if you want to make a real-time communication app that works with real-time streams of content.

3. Body Pacer

The NodeJS library body-parser object exposes a number of factories that can be used to build middleware.

4. Async.js

Async is a browser-based utility module that lets you deal with asynchronous JavaScript and install NodeJS with NPM async.

5. Passport

For Node.js developers, Passport is a one-of-a-kind authentication module.

6. Morgan

Morgan is one of the most popular libraries for Node developers, with millions of downloads every month.