https://openjdk.org/projects/shenandoah

Production-grade, airgapped Kubernetes installer combining upstream k8s with overlays and popular components

Kotsadm has been merged into the KOTS repo

KOTS provides the framework, tools and integrations that enable the delivery and management of 3rd-party Kubernetes applications, a.k.a. Kubernetes Off-The-Shelf (KOTS) Software.