• Open-source core tech: OpenStack, Kubernetes, CloudStack, OpenNebula.
• Enterprise suites: VMware, Red Hat OpenShift, Microsoft Azure Stack, Oracle Cloud@Customer.
• Managed/hosted PCaaS providers: OpenMetal, Rackspace, Equinix, HPE GreenLake, Dell APEX.

https://www.openstack.org/

https://www.vmware.com/products/cloud-infrastructure/vsphere

https://opennebula.io/

openmetal.io

Military

https://p1.dso.mil/