What is Amazon Aurora compatible with?

Could you elaborate on the compatibility aspects of Amazon Aurora? Specifically, which databases and systems does it integrate well with? I'm curious to know if it's compatible with popular open-source solutions like MySQL or PostgreSQL, as well as other cloud-based database services. Additionally, I'd like to understand if it offers seamless integration with other AWS services and tools to enhance overall performance and scalability. Clarifying these compatibility details would help me assess if Amazon Aurora is suitable for my project's specific needs.