VirtualBox
VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use.
QEMU (short for "Quick EMUlator") is a free and open-source hosted hypervisor that performs hardware virtualization.
qemu (short for "quick emulator") is a free and opensource hosted hypervisor that performs hardware virtualization.
qemu is a hosted virtual machine monitor: it emulates central processing units through dynamic binary translation and provides a set of device models, enabling it to run a variety of unmodified guest operating systems. it also provides an accelerated mode for supporting a mixture of binary translation (for kernel code) and native execution (for user code), in the same fashion as vmware workstation and virtualbox do. qemu can also be used purely for cpu emulation for userlevel processes, allowing applications compiled for one architecture to be run on another.
Productivity Utilities Networking and Admin
portable scriptable virtualization virtual-machine operating-system vmware vdmk-player
VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use.
Free Open Source Windows Linux BSD Mac Solaris
VMware Workstation Pro is a commercial hypervisor that allows users to create and run virtual machines on one computer.
Commercial
VMware Workstation Player builds on the industry leading foundation of Workstation Pro, and delivers a streamlined user interface for creating and running operating systems and applications in a virtual machine.
Free Personal Windows Linux
Parallels Desktop gives Mac users the ability to run Windows, Linux or any other operating system and their critical applications at the same time as Mac OS X on any Intel-powered Mac Pro, iMac, Mac Mini, MacBook or MacBook Pro.
Commercial
KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.
Free Open Source Linux
portable-virtualbox is a free and open source software tool that lets you run any operating system from a usb stick without separate installation. it unpacks and adjusts the paths and configuration of virtualbox so it will run portably.
Free Open Source Windows
ASG-Remote Desktop is the indispensable tool for administrative access to remote computers.
Commercial Windows
UCS Virtual Machine Manager (UVMM) is an easy-to-use and powerful administration tool for KVM.
Free Open Source Linux Univention Corporate Server
A powerful tool to help you easily migrate a Windows-based computer to a virtual environment (P2V) of a major virtualization software vendor, regardless of how or where the computer is being backed up.
Commercial Windows
CoreCluster is modular cloud computing platform dedicated for creating private IaaS clouds.
Free Open Source Linux Web
PetiteCloud is a HyperVisor frontend for BSD. It has the following features: Support for bhyve (including linux support) and QEMU (software emulation only until the FreeBSD port of kqemu is fixed).
Free Open Source BSD
VMLite XP Mode offers similar functions as Microsoft Windows XP Mode, but doesn't require hardware virtualization. It allows you to run Windows XP at the same time from your desktop running on a different host operating system.
Commercial Windows
Danube Cloud is a software solution used for creating, managing and automating cloud data centers.
Free Open Source Web Self-Hosted