Sites like masteringjs.io

MikroORM documentation for its TypeScript object-relational mapper and its database driver and tooling packages

Mongoose, an object modeling library for MongoDB in JavaScript, with documentation, changelog, news and plugin listings

A tutorial blog by BezKoder on mobile and web app development, databases, caching and software engineering topics

TresJS is an open-source framework for building interactive 3D scenes with Vue, layered on Three.js, documented on its official site

Documentation and project site for Passport.js, an authentication middleware library for Node.js applications

A JavaScript testing framework named Jest, documented on its official site, with French and English pages and community help

Mocha, a JavaScript test framework for Node.js and browsers, with its project documentation and API reference

Graphile, a software project building GraphQL API tools such as PostGraphile and Graphile Starter, with a news page

Maximiliano Firtman's blog on mobile and web development, covering PWAs, iOS Safari compatibility, web performance and client-side AI

A software engineering and data science blog by the Hackers and Slackers non-profit, covering Python, Ubuntu, Power BI and more

React Spring, a JavaScript library and documentation site for spring-physics animations in React applications

FormKit is a form-building framework and API for coding agents, with a Pro add-on of premium inputs, from a small Charlottesville team

Stefan Judis's blog on web development, with articles, tips, learning notes and a weekly newsletter

Babel, an open-source JavaScript compiler project with documentation, a browser REPL and a team page, converting modern JavaScript to older-compatible code

React Suite, an open-source React UI component library and documentation site for enterprise web applications

WebdriverIO API reference documentation for the WebdriverIO browser and mobile test automation framework's commands and protocol bindings

Aleksandr Hovhannisyan's personal website: a software developer's blog on programming, life and other topics, with notes, CSS art and guitar covers

Code Hike, a documentation and blog site by Rodrigo Pombo on building Markdown and React content websites with interactive code blocks

André Staltz's personal blog on software, open source, decentralization, programming and talks, with essays and conference talk listings

ESLint project website: documentation, playground and team pages for ESLint, the pluggable open-source JavaScript linter

TanStack, an open-source collection of headless web application libraries and tools, with a design system, blog and chat app

freeCodeCamp is a nonprofit programming tutorial publication covering Python, JavaScript, Git, and other developer topics

HackTricks is a multilingual wiki of hacking and pentesting techniques, cybersecurity notes and AI security tricks, maintained as an open-source book

NodeBook, an online Node.js book and lab series by Ishtmeet Singh on event loops, memory, networks and building a backend from raw TCP

An independent website of Linux tutorials, courses and terminal games, created by Abhishek Prakash

A weekly tech newsletter called Weekend Reading by Assaf Arkin, covering tools, UX, management, infosec and random finds

Fastify, a Node.js web framework project with documentation, community resources, benchmarks and a plugin ecosystem

Rust-based open source platform of fast developer tools such as a JavaScript/TypeScript compiler, documented by its project team

Appium documentation: an open-source software project for UI automation of mobile, browser and desktop apps

Kivy, an open-source Python framework for building cross-platform GUI apps, with a project blog, about page and documentation

Andy Clarke's web design studio and blog in North Wales, with books, templates and t-shirts on web design

Vite, a frontend build tool and development server for modern web projects, documented by its core team

Node.js, an open-source cross-platform JavaScript runtime for building servers, web apps, command line tools and scripts

A JavaScript library documentation site for Sinon.JS, offering stubs, spies, fakes and mocks for unit tests

node-postgres is a collection of Node.js modules for connecting to and querying PostgreSQL databases, with API documentation and guides