Proxmox - Proxmox is an open-source server virtualization management solution that offers the ability to manage virtual server technology with the Linux OpenVZ and KVM technology.
VirtualBox - VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as...
vSphere - Get started with VMware vSphere editions, the world’s leading server virtualization platform and the best foundation for your apps, your cloud, and your business.
Citrix XenApp - Virtualized Windows application and desktop delivery
VMware Fusion - Simple and powerful virtual machine for Mac. Mac virtualization software. Learn more about VMware Fusion and try it free today.
Parallels - Parallels Desktop is a virtualization software for Mac users to run Windows and Linux apps on OS X.