VirtualBox is a family of x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).
VirtualBox runs on Mac OS X, Windows, and Linux and supports a large number of guest operating systems including but not limited to Windows, DOS or Windows 3.x, Linux (2.4 and 2.6), and OpenBSD.
What's new in this version:
- VMM: new APIC and I/O APIC implementations that result in significantly improved performance in certain situations - VMM: added support for Hyper-V paravirtualized debugging of Windows guests - VMM: emulate even more MMIO and shadow pagetable exits without going back to user mode - GUI: overall migration to Qt5 - GUI: passive API event listener improving the VM GUI performance and response time - Audio: added HDA (High Definition Audio) support for newer Linux guests - Audio: added on-demand timers which should improve the overall performance and reduce the CPU consumption - Audio: more fine-grained volume control for the AC'97 emulation, which now also takes the master volume control into account - Better support for Python 3 - VMM: activate the x2APIC by default for Linux guests - VMM: many more fixes - GUI: the Detach UI action is now a part of the VM Machine menu - GUI: reworked session information window - GUI: the new VM wizard now allows to choose the VM location for the VM which is being created