Packages

AST

• babel-parser - JavaScript parser used in Babel.
• Acorn - Tiny, fast JavaScript parser.
• cherow - JavaScript parser with focus on performance and stability.

Authentication

• Passport - Simple, unobtrusive authentication.
• Grant - OAuth middleware for Express, Koa, and Hapi.

Authorization

• CASL - Isomorphic authorization for UI and API.
• node-casbin - Authorization library that supports access control models like ACL, RBAC and ABAC.

Automation

• robotjs - Desktop Automation: control the mouse, keyboard and read the screen.

Benchmarking

• Benchmark.js - Benchmarking library that supports high-resolution timers and returns statistically significant results.
• matcha - Simplistic approach to benchmarking.

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.
• rollup - Next-generation ES2015 module bundler.
• gulp - Streaming and fast build system that favors code over config.
• Broccoli - Fast, reliable asset pipeline, supporting constant-time rebuilds and compact build definitions.
• Brunch - Front-end web app build tool with simple declarative config, fast incremental compilation, and an opinionated workflow.
• Start - Functional task runner with shareable presets.
• ygor - Promising task runner for when npm run isn't enough and everything else is too much.
• FuseBox - Fast build system that combines the power of webpack, JSPM and SystemJS, with first-class TypeScript support.
• pkg - Package your Node.js project into an executable.

Command-line apps

• lessmd - Markdown in the terminal.
• speed-test - Test your internet connection speed and ping.
• emoj - Find relevant emoji from text on the command-line.
• pageres - Capture website screenshots.
• vtop - More better top, with nice charts.
• empty-trash - Empty the trash.
• is-up - Check whether a website is up or down.
• is-online - Check if the internet connection is up.
• public-ip - Get your public IP address.
• clipboard-cli - Copy & paste on the terminal.
• XO - Enforce strict code style using the JavaScript happiness style.
• ESLint - The pluggable linting utility for JavaScript.
• dev-time - Get the current local time of a GitHub user.
• David - Tells you when your package npm dependencies are out of date.
• Live Server - Development HTTP-server with livereload capability.
• bcat - Pipe command output to web browsers.
• normit - Google Translate with speech synthesis in your terminal.
• fkill - Fabulously kill processes. Cross-platform.
• pjs - Pipeable JavaScript. Quickly filter, map, and reduce from the terminal.
• license-checker - Check licenses of your app's dependencies.
• browser-run - Easily run code in a browser environment.
• tmpin - Adds stdin support to any CLI app that accepts file input.
• wifi-password - Get the current wifi password.
• wallpaper - Change the desktop wallpaper.
• brightness - Change the screen brightness.
• kill-tabs - Kill all Chrome tabs to improve performance, decrease battery usage, and save memory.
• subdownloader - Subtitle downloader for movies and TV series.
• dark-mode - Toggle the macOS Dark Mode.
• iponmap - IP location finder.
• Jsome - Pretty prints JSON with configurable colors and indentation.
• itunes-remote - Interactively control iTunes.
• mobicon - Mobile app icon generator.
• mobisplash - Mobile app splash screen generator.
• diff2html-cli - Pretty git diff to HTML generator.
• Cash - Cross-platform Unix shell commands in pure JavaScript.
• jscpd - Copy/paste detector for source code.
• atmo - Server-side API mocking.
• auto-install - Auto installs dependencies as you code.
• cost-of-modules - Find out which dependencies are slowing you down.
• localtunnel - Expose your localhost to the world.
• svg-term-cli - Share terminal sessions via SVG.
• gtop - System monitoring dashboard for the terminal.
• carbon-now-cli - Beautiful images of your code — from right inside your terminal.
• cash-cli - Convert between 170 currencies.
• discharge - Easily deploy static websites to Amazon S3.
• npkill - Easily find and remove old and heavy node_modules folders.
• themer - Generate themes for your editor, terminal, wallpaper, Slack, and more.
• Standard - JavaScript Standard Style — One style to rule them all.
• http-server - Simple, zero-config command-line HTTP server.
• trymodule - Try out npm packages in the terminal.
• taskbook - Tasks, boards & notes for the command-line habitat.
• pen - Live Markdown preview in the browser from your favorite editor.
• alex - Catch insensitive, inconsiderate writing.

Command-line utilities

• log-symbols - Colored symbols for various log levels.
• figures - Unicode symbols with Windows CMD fallbacks.
• cross-env - Set environment variables cross-platform.
• shelljs - Portable Unix shell commands.
• chalk - Terminal string styling done right.
• meow - CLI app helper.
• yargs - Command-line parser that automatically generates an elegant user-interface.
• ora - Elegant terminal spinner.
• get-stdin - Easier stdin.
• log-update - Log by overwriting the previous output in the terminal. Useful for rendering progress bars, animations, etc.
• Ink - React for interactive command-line apps.
• listr - Terminal task list.
• conf - Simple config handling for your app or module.
• ansi-escapes - ANSI escape codes for manipulating the terminal.
• boxen - Create boxes in the terminal.
• terminal-link - Create clickable links in the terminal.
• terminal-image - Display images in the terminal.
• string-width - Get the visual width of a string - the number of columns required to display it.
• cli-truncate - Truncate a string to a specific width in the terminal.
• first-run - Check if it's the first time the process is run.
• blessed - Curses-like library.
• Inquirer.js - Interactive command-line prompt.
• yn - Parse yes/no like values.
• cli-table3 - Pretty unicode tables.
• drawille - Draw on the terminal with unicode braille characters.
• ascii-charts - ASCII bar chart in the terminal.
• cli-cursor - Toggle the CLI cursor.
• columnify - Create text-based columns suitable for console output. Supports cell wrapping.
• cli-columns - Columnated unicode and ansi-safe text lists.
• cfonts - Sexy ASCII fonts for the console.
• multispinner - Multiple, simultaneous, individually controllable CLI spinners.
• omelette - Shell autocompletion helper.
• sudo-block - Block users from running your app with root permissions.
• loud-rejection - Make unhandled promise rejections fail loudly instead of the default silent fail.
• sparkly - Generate sparklines ▁▂▃▅▂▇.
• Bit - Create, maintain, find and use small modules and components across repositories.
• gradient-string - Beautiful color gradients in terminal output.
• oclif - CLI framework complete with parser, automatic documentation, testing, and plugins.
• Cliffy - Framework for interactive CLIs.
• term-size - Reliably get the terminal window size.
• update-notifier - Update notifications for your CLI app.
• insight - Helps you understand how your tool is being used by anonymously reporting usage metrics to Google Analytics.

Compression

• yazl - Zip.
• yauzl - Unzip.
• Archiver - Streaming interface for archive generation, supporting ZIP and TAR.
• pako - High speed zlib port to pure js (deflate, inflate, gzip).
• tar-stream - Streaming tar parser and generator. Also see tar-fs.
• decompress - Decompression module with support for tar, tar.gz and zip files out of the box.

Content management systems

• Tipe - Developer-first content management system with GraphQL and REST API from a schema file.
• ButterCMS - Headless CMS
• KeystoneJS - CMS and web application platform built on Express and MongoDB.
• 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.
• ButterCMS - Headless CMS

Control flow

• Bluebird - Promise library with focus on innovative features and performance.
• pify - Promisify a callback-style function.
• delay - Delay a promise a specified amount of time.
• promise-memoize - Memoize promise-returning functions, with expire and prefetch.
• valvelet - Limit the execution rate of a promise-returning function.
• p-map - Map over promises concurrently.
• More…
• zen-observable - Implementation of Observables.
• RxJS - Reactive programming.
• More…
• Highland.js - Manages synchronous and asynchronous code easily, using nothing more than standard JavaScript and Node-like Streams.
• each-async - Async concurrent iterator like forEach.
• async - Provides straight-forward, powerful functions for working with asynchronicity.
• js-csp - Communicating sequential processes for JavaScript (like Clojurescript core.async, or Go).

Database

• PostgreSQL - PostgreSQL client. Pure JavaScript and native libpq bindings.
• LevelUP - LevelDB.
• MySQL - MySQL client.
• couchdb-nano - CouchDB client.
• Aerospike - Aerospike client.
• Couchbase - Couchbase client.
• MongoDB - MongoDB driver.
• Sequelize - Multi-dialect ORM. Supports PostgreSQL, SQLite, MySQL, and more.
• Bookshelf - ORM for PostgreSQL, MySQL and SQLite3 in the style of Backbone.js.
• Mongoose - Elegant MongoDB object modeling.
• Waterline - Datastore-agnostic tool that dramatically simplifies interaction with one or more databases.
• 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.
• Objection.js - Lightweight ORM built on the SQL query builder Knex.
• 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.
• NeDB - Embedded persistent database written in JavaScript.
• Lowdb - Small JavaScript database powered by Lodash.
• Finale - RESTful endpoint generator for your Sequelize models.
• database-js - Wrapper for multiple databases with a JDBC-like connection.
• Mongo Seeding - Populate MongoDB databases with JavaScript and JSON files.
• @databases - Query PostgreSQL, MySQL and SQLite3 with plain SQL without risking SQL injection.
• Redis - Redis client.
• Keyv - Simple key-value storage with support for multiple backends.
• Massive - PostgreSQL data access tool.
• Knex - Query builder for PostgreSQL, MySQL and SQLite3, designed to be flexible, portable, and fun to use.

Data validation

• joi - Object schema description language and validator for JavaScript objects.
• is-my-json-valid - JSON Schema validator that uses code generation to be extremely fast.
• property-validator - Easy property validation for Express.
• ajv - The fastest JSON Schema validator. Supports v5, v6 and v7 proposals.
• schema-inspector - JSON API sanitization and validation.

Date

• Luxon - Library for working with dates and times.
• date-fns - Modern date utility.
• Day.js - Immutable date library alternative to Moment.js.
• dateformat - Date formatting.
• tz-format - Format a date with timezone: 2015-11-30T10:40:35+01:00.
• cctz - Fast parsing, formatting, and timezone conversation for dates.
• Moment.js - Parse, validate, manipulate, and display dates.

Debugging / Profiling

• ndb - Improved debugging experience, enabled by Chrome DevTools.
• ironNode - Node.js debugger supporting ES2015 out of the box.
• node-inspector - Debugger based on Blink Developer Tools.
• why-is-node-running - Node.js is running but you don't know why?
• njsTrace - Instrument and trace your code, see all function calls, arguments, return values, as well as the time spent in each function.
• stackman - Enhance an error stacktrace with code excerpts and other goodies.
• locus - Starts a REPL at runtime that has access to all variables.
• 0x - Flamegraph profiling.
• ctrace - Well-formatted and improved trace system calls and signals.
• leakage - Write memory leak tests.
• llnode - Post-mortem analysis tool which allows you to inspect objects and get insights from a crashed Node.js process.
• thetool - Capture different CPU, memory, and other profiles for your app in Chrome DevTools friendly format.
• swagger-stats - Trace API calls and monitor API performance, health, and usage metrics.
• NiM - Manages DevTools debugging workflow.
• vstream - Instrumentable streams mix-ins to inspect a pipeline of streams.
• debug - Tiny debugging utility.

Documentation

• documentation.js - API documentation generator with support for ES2015+ and flow annotation.
• ESDoc - Documentation generator targeting ES2015, attaching test code and measuring documentation coverage.