Enterprise Storage OS, also known as ESOS, is a GNU General Public License (GPL) licensed Linux distribution that serves as a block-level storage server in a storage area network (SAN).
Pacemaker is an open-source high availability resource manager software used on computer clusters since 2004.
Proxmox Virtual Environment (Proxmox VE) is an open-source server virtualization environment.
The Red Hat Cluster includes software to create a high availability and load balancing cluster.
Virtual synchrony is an interprocess message passing (sometimes called ordered, reliable multicast) technology.
VMmanager is a commercial Linux-based Server virtualization software control panel or type II OpenVZ / KVM hypervisor.