There are a number of commercial products based on Red Hat Enterprise Linux (RHEL). Information about these products and the version of RHEL they are based on is often difficult to come by, since this fact is not widely publicised.
Thales Computers is embedding Red Hat Enterprise Linux 4 and 5 with its boards products, small and HPC turn-key computers
VMware ESX Server is VMware's enterprise-class virtualization platform. It contains two parts: the VMkernel, a proprietary hypervisor, and a Service Console, which supports various management interfaces. The Service Console is also known as the Console Operating System (COS). The Service Console is based on following Red Hat products:
ESX Server 2.x Service Console is based on Red Hat Linux 7.2
ESX Server 3.0 Service Console is based on Red Hat Enterprise Linux 3.0 Update 6. [3]
ESX Server 3.5 Service Console is based on Red Hat Enterprise Linux 3.0 Update 8. [4]
