React, Vue, Angular, Svelte, Gatsby, Next, JS, Node, TypeScript, StoryBook, you name it.
The best option to start - Complete Intro to Web Development.
Free/Paid
FreeCodeCamp is definitely the best completely free online resource for learning to code.
The best option to start - Responsive Web Design Certification.
https://www.freecodecamp.org/learn
Free
A huge amount of courses from the greatest universities around the world.
The best option to start - Internet History, Technology, and Security (University of Michigan).
Free/Paid
One of the greatest and well known open source communities. Don't forget to check the Firefox Browser Developer Edition.
The best option to start - Learn web development.
https://developer.mozilla.org/
Free
An extremely understandable and intelligible educational website for learning web technologies.
The best option to start - Learn HTML.
Free
A broad selection of IT courses on a variety of topics, from Web Dev to Hardware.
The best option to start - any course by Maximilian Schwarzmüller.
Paid
The short but capacious courses. Mainly on the topics of web programming and frontend.
The best option to start - The Beginner's Guide to React.
Free/Paid
The best option to start - JavaScript30.
Free/Paid
The best option to start - The Coding Bootcamp Primer.
https://scrimba.com/allcourses
Free/Paid
The best option to start - Become a Software Developer.
https://www.linkedin.com/learning/
Free/Paid
The best option to start - The JavaScript Beginner's Handbook.
Free/Paid
The best option to start - Track: Python Developer.
https://www.jetbrains.com/academy/
Paid
The best option to start - Learn to Code for the Web (University of Leeds).
Free/Paid
The best option to start - CS50's Introduction to Computer Science (Harvard University).
Free/Paid
The best option to start - Javascript Tutorial.
Free
The best option to start - Elements of AI.
Free
Please feel free to complete the list by replying to this post. Which resources do you like best?