https://spring.academy/courses
https://spring.academy/guides
https://spring.io/guides

2024
https://www.infoq.com/news/2024/04/spring-academy-pro-free
https://spring.io/blog/2024/04/10/spring-academy-pro-content-now-free-to-access
2023
https://spring.academy/paths/spring-certified-professional-2023