Sagan

Sagan is a tool for helping run collections of Terraform projects. It aims to make the deployment and management of multiple projects significantly easier and faster. It’s intended to supplement tools like Atlantis, especially in circumstances where they may not be feasible to use, such as when initially deploying a set of modules when doing an initial buildout.

Behind the scenes, it can manage tunnels, the automatic generation of credentials, &c. It also supports dependencies, rebuilds based on updates, and parallelism.