VirtualBox:
Oracle VM VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and innotek VirtualBox) is a virtualization software package for x86 and AMD64/Intel64-based computers from Oracle Corporation. innotek GmbH first developed the product;Sun Microsystems purchased it in 2008; Oracle has continued development since 2010.The VirtualBox package installs on an existing host operating system as an application; this host application allows additional guest operating systems, each known as a Guest OS, to load and run, each with its own virtual environment.
Supported host operating systems include Linux, Mac OS X, Windows XP, Windows Vista, Windows 7, Windows 8, Solaris, and OpenSolaris; there are also ports to Free BSD and Genode.
Supported guest operating systems include versions and derivations of Windows, Linux, BSD, OS/2, Solaris, Haiku and others. Since release 3.2.0, VirtualBox also allows limited virtualization of Mac OS X guests on Apple hardware, though OSX86 can also be installed using VirtualBox.
Since version 4.3 (released in October 2013), Microsoft Windows guests on supported hardware can take advantage of the recently implemented WDDM driver included in the guest additions; this allows Windows Aero to be enabled along with Direct3D support.
Guest Additions should be installed in order to achieve the best possible experience.The Guest Additions can be installed inside a virtual machine after the installation of the guest operating system. They consist of device drivers and system applications that optimize the guest operating system for better performance and usability.
Feature set:
64-bit guests (hardware virtualization support is required)Snapshots
Seamless mode - the ability to run virtualized applications side by side with your normal desktop applications
Shared clipboard
Shared folders
Special drivers and utilities to facilitate switching between systems
Command line interaction (in addition to the GUI)
Public API (Java, Python, SOAP, XPCOM) to control VM configuration and execution.
Nested paging for AMD-V and Intel VT (only for processors supporting SLAT and with SLAT enabled)
Limited support for 3D graphics acceleration (including OpenGL up to (but not including) 3.0 and Direct3D 9.0c via Wine's Direct3D to OpenGL translation)
SMP support (up to 32 virtual CPUs per virtual machine), since version 3.0
Teleportation (aka Live Migration)
2D video output acceleration (not to be mistaken with video decoding acceleration), since version 3.1
Storage emulation features
NCQ support for SATA, SCSI and SAS raw disks and partitionsPass-through mode for solid-state drives
Pass-through mode for CD/DVD/BD disks - allows to play audio CDs, burn optical disks, play encrypted DVD disks
Can disable host OS I/O cache
Allows to limit IO bandwidth
PATA, SATA, SCSI, SAS, iSCSI, floppy disk controllers
Storage support
Raw hard disk access – allows physical hard disk partitions on the host system to appear in the guest systemVMware Virtual Machine Disk (VMDK) format support – allows VirtualBox to exchange disk images with VMware
Microsoft VHD support
QEMU qed and qcow disks
HDD format disks (only version 2; version 3 and 4 are not supported) used by Parallels virtualization products.
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