Database

sequelize - Multi SQL dialect ORM for PostgreSQL, MySQL, SQLite and MSSQL

mongodb - Official MongoDB driver

sqlite - Asynchronous, non-blocking SQLite3

Search

VerbalExpression - RegEx made easy

Fuse - fuzzy search for json object.

Task Scheduler

later - The simplest way to work with recurring schedules.

agenda - Lightweight, backed by mongo.

bee-queue - A simple, fast, robust, backed by Redis.

bull - Premium Queue package for handling jobs and messages.

HTTP request

axios - Promise based HTTP client for the browser and node.js.

RESTful API

express - Fast, unopinionated, minimalist web framework.

restify - Optimized for building semantically correct web services.

apiDoc - Documentation in source code.

json-server - fake REST API with zero coding < 30 seconds (seriously)

Authentication

passport - A variety of authentication strategies.

jwt - Decode, verify and generate JWT.

Utility

moment - Parse, validate, manipulate, and display dates and times.

mathjs - An extensive math library.

lodash - Easier work with arrays, numbers, objects, strings, etc.

30-seconds-of-code - snippets that you can understand in 30 seconds or less

Voca - manipulating strings

Babel - convert ECMAScript 2015+ into a backwards compatible version of JavaScript

esm - bundle-less es6 import/export syntax.

Flow - a static type checker

inquirer- a interactive command line user interfaces

Development process

nodemon - Monitor for any changes in your node.js application and automatically restart the server.

pm2 - a Production Runtime and Process Manager for Node.js applications with a built-in Load Balancer

dotenv - Loads environment variables from files

IoT

mqtt - Basic pub/sub for light weight device.

amqp - More advanced

Serialport - access serial ports- Linux, OSX and Windows

Node-RED - Flow-based programming

Testing

jest - testing framework

mocha - testing framework

editor

editor.js - A block-styled editor with clean JSON output

draft.js - Rich Text Editor Framework for React