These are my daily used links to study, practice and build projects. This list will get updated as soon as I get new links, but you can also contribute by adding those you know creating a Pull Request.
GitHub - software development and version control using Git
https://github.com/
GitLab - software development and version control using Git
https://about.gitlab.com/
Dev.to - sharing and reading programming-related articles
https://dev.to/
Stack Overflow - get help with your questions
https://stackoverflow.com/
W3Schools - exercises and documentation of different programming languages
https://www.w3schools.com/
DevDocs - open-source documentation of different programming languages
https://devdocs.io/
Exercism - exercises in different programming languages
https://exercism.org/
Programiz - exercises and documentation of different programming languages
https://www.programiz.com/
CS50X - entire Harvard computer programming course (paid certification)
https://www.edx.org/course/introduction-computer-science-harvardx-cs50x
CodeAcademy - exercises and documentation of different programming languages
https://www.codecademy.com/
FreeCodeCamp - exercises and documentation of different programming languages
https://www.freecodecamp.org/
Khan Academy - exercises and documentation of different programming languages
https://www.khanacademy.org/
Geeks for Geeks - exercises and documentation of different programming languages
www.geeksforgeeks.org
CodePad - online compiler
https://codeinterview.io/
Carbon - images of your code snippets
https://carbon.now.sh/
Google Fonts - open-source fonts
https://fonts.google.com/
Can I Use - see exactly how well a feature is supported among different browsers
https://caniuse.com/
Brainboard - build cloud infrastructure
https://www.brainboard.co/
Stackedit - markdown editor
https://stackedit.io/
Responsively - devTool that will make your job with responsivity easier
https://responsively.app/
Codepen - online editor
https://codepen.io/
CodeSandbox - online editor
https://codesandbox.io/
Stackblitz - an online development environment for frontend, Node.js and the JavaScript ecosystem
https://stackblitz.com/
Postman - Edit, Save, Send, Share, Test... Do basically anything with HTTP requests to APIs
https://www.postman.com
Fiddler Classic - Sniff traffic on your machine to capture HTTP requests being sent by applications
https://www.telerik.com/fiddler/fiddler-classic
Web Dev Simplified - Web Development
https://www.youtube.com/c/WebDevSimplified
Code with Ania Kubów - JavaScript, Blockchain and Front End
https://www.youtube.com/c/AniaKubów
Rachel How - UX/UI and Front End
www.youtube.com/c/RachelHow
Fireship - Programming in general
https://www.youtube.com/c/Fireship
Alex Lee - Java
https://www.youtube.com/c/AlexLeeYT
Ben Awad - Front End and Python
https://www.youtube.com/c/BenAwad97
Jonah Lawrence - Web Development
https://www.youtube.com/c/DevProTips
Sonny Sangha - Full Stack Development
https://www.youtube.com/c/SonnySangha
Tiff in Tech - Software Development
https://www.youtube.com/c/TiffInTech
Dev as lif - Software Development wih VI environment
https://www.youtube.com/c/devaslife