MiniStack
Ministack: Free, open-source local AWS emulator
...One of its defining characteristics is its use of “real infrastructure” where possible, meaning services like databases and container orchestration are backed by actual technologies such as PostgreSQL, MySQL, Redis, and Docker instead of pure mocks. The system is designed to be drop-in compatible with existing AWS tooling, including boto3, Terraform, AWS CLI, and other SDKs, making migration seamless for existing projects. MiniStack also prioritizes efficiency, with a significantly smaller footprint and faster startup time compared to alternatives, making it ideal for local development environments.