2/ Claude Academy: https://academy.claude.com/
3/ Oracle OCI Foundations: https://mylearn.oracle.com/
4/ freeCodeCamp: https://www.freecodecamp.org/learn
5/ Microsoft Applied Skills: https://learn.microsoft.com/en-us/credentials/applied-skills/
6/ Google Skillshop: https://skillshop.withgoogle.com/
7/ Cisco Networking Academy: https://www.netacad.com/
8/ IBM SkillsBuild: https://skillsbuild.org/