W3Schools is a freemium educational website for learning coding online. Developed in 1998, its name is derived from the World Wide Web.W3Schools offers courses covering all aspects of web development. It is run by Refsnes Data in Norway.
MDN Web Docs, previously Mozilla Developer Network and formerly Mozilla Developer Center, is a documentation repository and learning resource for web developers used by Mozilla, Microsoft, Google, and Samsung.
Codecademy is an American online interactive platform that offers free coding classes in 12 different programming languages including Python, Java, Go, JavaScript, Ruby, SQL, C++, C#, Swift, and Sass, as well as markup languages HTML and CSS.
Programiz is a free Android app that makes it easy to learn Python and try out what you have learned in real-time. You can use the app to follow through Python tutorials step-by-step, experiment with Python code in each lesson using the in-built Python interpreter, take quizzes and more to learn basic concepts of Python 3 from beginning to advanced.
Scrimba allows you to study where you want, when you want. We also substitute the classroom teaching experience with interactive screencast, live events, and peer-to-peer help between students. ... Getting help at Scrimba is done peer-to-peer, meaning students help and support each other, instead of teacher-to-student.