Since the 1.6.0 release, the Atomic Developer Bundle (ADB) includes support for Mesos-Marathon as an orchestrator. This is in conjunction with the support for Mesos-Marathon that was added to Atomic App 0.3.0. This feature supports developers choosing to work with atomicapps on Mesos-Marathon.
Mesos Marathon is a distributed control system which can be used for container orchestration in large server clusters. Some Docker-based infrastructure teams use Mesos instead of Kubernetes. Learn more here: