arconia

Arconia is a framework that acts as an add-on for Spring Boot, designed to enhance modern enterprise applications built with Java. You can add Arconia to an existing Spring Boot application to boost developer experience, reduce boilerplate, and seamlessly adopt cloud native patterns. Maintained by arconia-io on GitHub, where it has earned 179 stars from the community.

It's actively developed around java, multitenancy, spring-boot, and is a solid reference for anyone building with these tools.