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W3Schools
Learn to Code with the World's Largest Developer Site. Tutorials, References, Exercises, Examples, Quizzes, Courses, Certificates. Learn: HTML, CSS, JavaScript, SQL, PHP, Python, jQuery, C++, C#, Bootstrap, Git...
MDN WebDocs
Resources for Developers, by Developers. References, Guides, Turtorials. Learn: Web Development, Gaming Development, Developer Tools, Web Technologies: HTML, CSS, JavaScript, Graphics, APIs, Browser Extensions...
StackOverflow
A community-based space to find and contribue answers to technical challenges and one of the most popular wesbites in the world. Join the community! Services: Ask Questions, Answers, Reference, Jobs, Companies, Collectives, Collaborate, Share...
StackExchange
The Stack Exchange network comprises 173 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers, Ask questions, get answers, no distractions. Find community digests, top users, Q&A sites...
GitHub
Where the world builds software. The largest and most advanced development platform in the world! Services: Web hosting, cloud platform, codespaces, repositories, open source, integrations...
CodePen
The best place to build, test, and discover front-end code. CodePen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration.
GitLab
GitLab's DevOps platform is a single application for unparalleled collaboration, visibility, and development velocity. Learn more here! Free unlimited (private) repositories and unlimited collaborators. Explore projects on GitLab.com (no login needed); Click the link for more information ...
Git-Fast-Version-Control
Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git branching and merging, free and open source, data assurance, pro git book...
NPM
The NPM registry is a public collection of packages of open-source code for Node.js, front-end web apps, mobile apps, robots, routers, and countless other needs of the JavaScript community. NPM is the command-line-client that allows developers to install and publish those packages.
Yarn
Yarn is a package manager that doubles down as project manager. Whether you work on one-shot projects or large monorepos, as a hobbyist or an enterprise user, we've got you covered. Yarn does this quickly, securely, and reliably so you don't ever have to worry.
Homebrew
The Missing Package Manager for macOS (or Linux. Homebrew installs the stuff you need that Apple (or your Linux system) didn’t.Homebrew is the easiest and most flexible way to install the UNIX tools Apple didn’t include with macOS
CDNJS
CDNJS is a free and open-source CDN service trusted by over 12.5% of all websites, serving over 200 billion requests each month, powered by Cloudflare. We make it faster and easier to load library files on your websites. Search from 4,141 libraries on CDNJS.
OpenBase
Compare open-source packages with powerful metrics and user reviews. Over 500+ Package Categories. Discover the top-rated packages. Evaluate using metrics and reviews. Choose the right package.
DevDocs
DevDocs combines multiple API documentations in a fast, organized, and searchable interface. DevDocs is free and open source. It was created by Thibaut Courouble and is operated by freeCodeCamp.
OverAPI
Collecting All Cheatsheets. A-Z list of helpful resources. This is the whole code of OverAPI, you can fork it and use it like Github Pages locally.
Devhints
A modest collection of cheatsheets for a variety of coding languages, libraries and applications.
Heroku
Heroku is a cloud-based, fully-managed platform as a service (Paas) for building, running, and managing apps. Developers, teams, and businesses of all sizes use Heroku to deploy, manage, and scale apps.