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
GitLab - software development and version control using Git
Dev.to - sharing and reading programming-related articles
Stack Overflow - get help with your questions
W3Schools - exercises and documentation of different programming languages
DevDocs - open-source documentation of different programming languages
Exercism - exercises in different programming languages
Programiz - exercises and documentation of different programming languages
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
FreeCodeCamp - exercises and documentation of different programming languages
Khan Academy - exercises and documentation of different programming languages
Geeks for Geeks - exercises and documentation of different programming languages
CodePad - online compiler
Carbon - images of your code snippets
Google Fonts - open-source fonts
Can I Use - see exactly how well a feature is supported among different browsers
Brainboard - build cloud infrastructure
Stackedit - markdown editor
Responsively - devTool that will make your job with responsivity easier
Codepen - online editor
CodeSandbox - online editor
Stackblitz - an online development environment for frontend, Node.js and the JavaScript ecosystem
Postman - Edit, Save, Send, Share, Test... Do basically anything with HTTP requests to APIs
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 KubĂłw - JavaScript, Blockchain and Front End
https://www.youtube.com/c/AniaKubĂłw
Rachel How - UX/UI and Front End
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