Official

• Repository

Packages

Authentication

• Grant - OAuth providers for Express, Koa, Hapi, Fastify, AWS Lambda, Azure, Google Cloud, Vercel, and many more.

Authorization

• node-casbin - Authorization library that supports access control models like ACL, RBAC and ABAC.

Blogging

• Ghost - Simple, powerful publishing platform.
• Hexo - Fast, simple and powerful blogging framework.

Build tools

• parcel - Blazing fast, zero config web app bundler.
• webpack - Packs modules and assets for the browser.
• Brunch - Front-end web app build tool with simple declarative config, fast incremental compilation, and an opinionated workflow.
• FuseBox - Fast build system that combines the power of webpack, JSPM and SystemJS, with first-class TypeScript support.

Command-line apps

• np - Better npm publish.
• is-online - Check if the internet connection is up.
• ESLint - The pluggable linting utility for JavaScript.
• bcat - Pipe command output to web browsers.
• fkill - Fabulously kill processes. Cross-platform.
• browser-run - Easily run code in a browser environment.
• wallpaper - Change the desktop wallpaper.
• pen - Live Markdown preview in the browser from your favorite editor.
• diff2html-cli - Pretty git diff to HTML generator.
• trymodule - Try out npm packages in the terminal.
• cash-cli - Convert between 170 currencies.
• npkill - Easily find and remove old and heavy node_modules folders.

Command-line utilities

• chalk - Terminal string styling done right.
• meow - CLI app helper.
• Ink - React for interactive command-line apps.
• Inquirer.js - Interactive command-line prompt.
• shelljs - Portable Unix shell commands.
• Bit - Create, maintain, find and use small modules and components across repositories.
• zx - Write shell scripts JavaScript.

Compression

• Archiver - Streaming interface for archive generation, supporting ZIP and TAR.

Content management systems

• ApostropheCMS - Content management system with an emphasis on intuitive front end content editing and administration built on Express and MongoDB.
• Strapi - Content Management Framework (headless-CMS) to build powerful APIs.

Control flow

• p-map - Map over promises concurrently.
• More…
• RxJS - Reactive programming.
• observable-to-promise - Convert an Observable to a Promise.

Database

• LevelUP - LevelDB.
• MySQL - MySQL client.
• Aerospike - Aerospike client.
• Sequelize - Multi-dialect ORM. Supports PostgreSQL, SQLite, MySQL, and more.
• Bookshelf - ORM for PostgreSQL, MySQL and SQLite3 in the style of Backbone.js.
• OpenRecord - ORM for PostgreSQL, MySQL, SQLite3 and RESTful datastores. Similar to ActiveRecord.
• pg-promise - PostgreSQL framework for native SQL using promises.
• slonik - PostgreSQL client with strict types, detailed logging and assertions.
• TypeORM - ORM for PostgreSQL, MariaDB, MySQL, SQLite, and more.
• MikroORM - TypeScript ORM based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, PostgreSQL, MySQL and SQLite.
• Prisma - Modern database access (ORM alternative). Auto-generated and type-safe query builder in TypeScript. Supports PostgreSQL, MySQL & SQLite.
• Knex - Query builder for PostgreSQL, MySQL and SQLite3, designed to be flexible, portable, and fun to use.
• Lowdb - Small JavaScript database powered by Lodash.
• database-js - Wrapper for multiple databases with a JDBC-like connection.
• @databases - Query PostgreSQL, MySQL and SQLite3 with plain SQL without risking SQL injection.

Data validation

• schema-inspector - JSON API sanitization and validation.
• Superstruct - Simple and composable way to validate data in JavaScript (and TypeScript).

Date

• date-fns - Modern date utility.

Debugging / Profiling

• debug - Tiny debugging utility.
• locus - Starts a REPL at runtime that has access to all variables.
• leakage - Write memory leak tests.
• dats - Minimalistic and zero-dependencies StatsD client.

Documentation

• documentation.js - API documentation generator with support for ES2015+ and flow annotation.
• JSDoc - API documentation generator similar to JavaDoc or PHPDoc.
• Docusaurus - Documentation website generator that leverages React and Markdown, and comes with translation and versioning features.

Filesystem

• globby - Glob files with support for multiple patterns.
• fs-extra - Extra methods for the fs module.

Forum

• nodeBB - Forum platform for the modern web.

Functional programming

• lodash - Utility library delivering consistency, customization, performance, & extras. A better and faster Underscore.js.
• Ramda - Utility library with a focus on flexible functional composition enabled by automatic currying and reversed argument order. Avoids mutating data.
• RxJS - Functional reactive library for transforming, composing, and querying various kinds of data.
• Kefir.js - Reactive library with focus on high performance and low memory usage.

Hardware

• johnny-five - Firmata based Arduino Framework.
• serialport - Access serial ports for reading and writing.
• i2c-bus - I2C serial bus access.
• onoff - GPIO access and interrupt detection.
• spi-device - SPI serial bus access.
• pigpio - Fast GPIO, PWM, servo control, state change notification, and interrupt handling on the Raspberry Pi.
• gps - NMEA parser for handling GPS receivers.

HTTP

• axios - Promise based HTTP client (works in the browser too).
• gotql - GraphQL request library built on got.
• purest - REST client.

Image

• sharp - The fastest module for resizing JPEG, PNG, WebP and TIFF images.
• ImageScript - Image processing in JavaScript, utilizing WebAssembly for performance.

Mad science

• webtorrent - Streaming torrent client for Node.js and the browser.
• ipfs - Distributed file system that seeks to connect all computing devices with the same system of files.
• BitcoinJS - Clean, readable, proven Bitcoin library.
• turf - Modular geospatial processing and analysis engine.
• NodeOS - The first operating system powered by npm.
• YodaOS - AI operating system.
• Cytoscape.js - Graph theory (a.k.a. network) modeling and analysis.
• xlsx - Pure JS Excel spreadsheet reader and writer.
• isomorphic-git - Pure JavaScript implementation of Git.

Math

• mathjs - An extensive math library.

Minifiers

• minimize - HTML minifier.

Miscellaneous

• execa - Better child_process.
• file-type - Detect the file type of a Buffer.
• ow - Function argument validation for humans.
• dotenv - Load environment variables from .env file.
• nodegit - Native bindings to Git.
• json-strictify - Safely serialize a value to JSON without data loss or going into an infinite loop.
• jsdom - JavaScript implementation of HTML and the DOM.
• emittery - Simple and modern async event emitter.
• patch-package - Make and preserve fixes to npm dependencies.
• wild-wild-path - Object property paths with wildcards and regexes.

Natural language processing

• retext - An extensible natural language system.
• franc - Detect the language of text.
• nlp.js - Building bots, with entity extraction, sentiment analysis, automatic language identify, and more.

Network

• DHCP - DHCP client and server.
• netcat - Netcat port in pure JS.

Node.js management

• fnm - Cross-platform Node.js version manager built in Rust.

Parsing

• remark - Markdown processor powered by plugins.
• markdown-it - Markdown parser with 100% CommonMark support, extensions and syntax plugins.
• URI.js - URL mutation.
• PEG.js - Simple parser generator that produces fast parsers with excellent error reporting.
• nearley - Simple, fast, powerful parsing for JavaScript.
• xml2js - XML to JavaScript object converter.
• xlsx-populate - Read/write Excel XLSX.
• Chevrotain - Very fast and feature rich parser building toolkit for JavaScript.

Real-time

• Socket.io - Enables real-time bidirectional event-based communication.
• SocketCluster - Scalable HTTP + WebSocket engine which can run on multiple CPU cores.
• Primus - An abstraction layer for real-time frameworks to prevent module lock-in.
• MQTT.js - Client for MQTT - Pub-sub based messaging protocol for use on top of TCP/IP.

Security

• themis - Multilanguage framework for making typical encryption schemes easy to use: data at rest, authenticated data exchange, transport protection, authentication, and so on.

Serialization

• protobuf - Implementation of Protocol Buffers.
• compactr - Implementation of the Compactr protocol.

Static site generators

• Charge - Opinionated, zero-config static site generator using JSX and MDX.

Streams

• multistream - Combine multiple streams into a single stream.

Templating

• marko - HTML-based templating engine that compiles templates to CommonJS modules and supports streaming, async rendering and custom tags.

Testing

• AVA - Futuristic test runner.
• Mocha - Feature-rich test framework making asynchronous testing simple and fun.
• nyc - Code coverage tool built on istanbul that works with subprocesses.
• Sinon.JS - Test spies, stubs and mocks.
• Nock - HTTP mocking and expectations.
• intern - Code testing stack.
• Nightwatch - Automated UI testing framework based on Selenium WebDriver.
• WebdriverIO - Automated testing based on the WebDriver protocol.
• CodeceptJS - End-to-end testing.
• Playwright - Headless Chromium, WebKit, and Firefox with a single API.
• nve - Run any command on multiple versions of Node.js locally.

Text

• he - HTML entity encoder/decoder.
• i18next - Internationalization framework.
• StegCloak - Conceal secrets within strings, in plain sight.

Web frameworks

• Express - Web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications.
• Feathers - Microservice framework built in the spirit of Express.
• Meteor - An ultra-simple, database-everywhere, data-on-the-wire, pure-Javascript web framework. (You might like awesome-meteor)
• ActionHero - Framework for making reusable & scalable APIs for TCP sockets, WebSockets, and HTTP clients.
• seneca - Toolkit for writing microservices.
• Nest - Angular-inspired framework for building efficient and scalable server-side apps.
• Tinyhttp - Modern and fast Express-like web framework.
• Marble.js - Functional reactive framework for building server-side apps, based on TypeScript and RxJS.
• Lad - Framework made by a former Express TC and Koa member that bundles web, API, job, and proxy servers.

Resources

Tutorials

• Node.js Best Practices - Summary and curation of the top-ranked content on Node.js best practices, available in multiple languages.
• Portable Node.js guide - Practical guide on how to write portable/cross-platform Node.js code.