Server Virtualization

It would be really hard to create a multi-tenant, self-service cloud without virtualization, so here are the major players.

 
http://www.citrix.com/xenserver

http://www-03.ibm.com/systems/virtualization/infrastructure/server/index.html

http://fedoraproject.org/wiki/Virtualization_Quick_Start

http://www.linux-kvm.org/page/Main_Page

http://www.microsoft.com/hyper-v-server/en/us/default.aspx

http://www.novell.com/solutions/virtualization-workload/

http://wiki.openvz.org/Main_Page

http://www.oracle.com/us/technologies/virtualization/index.html

http://www.parallels.com/products/server/baremetal/

http://www.proxmox.org/products/proxmox-ve

http://wiki.qemu.org/Main_Page

http://www.redhat.com/virtualization/rhev/server/

http://www.ubuntu.com/server/features/virtualisation

http://www.virtualbox.org/

http://www.vmware.com/virtualization/