InnoTek VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software. 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 Public License (GPL). Presently, VirtualBox runs on Windows and Linux 32-bit hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista), DOS/Windows 3.x, Linux (2.4 and 2.6), and OpenBSD.
What's new:
Jan 15, 2007. InnoTek today released VirtualBox Open Source Edition (OSE), marking an important milestone in the development of PC virtualization software. VirtualBox OSE is the first professional PC virtualization solution released as open source under the GNU General Public License (GPL). With VirtualBox, customers get the most versatile virtualization product on the market, both for enterprise and individual use. VirtualBox' open source license allows everyone to contribute to the development of the product and customize it to suit individual needs. Backed by Europe's largest team of virtualization experts, VirtualBox continues to be developed and supported.
















Looks like a real competitor for VMware.
Also, if you prefer Microsoft products, there's Microsoft Virtual Server 2005 R2 that's also free. I believe (not 100% positive) that Microsoft Virtual PC is also free now.
And there's also Bochs, that's free (open source, too, hosted over at SourceForge). And depending on your definition of virtualization, there's also VDMsound, that's a NT VM for old DOS-era games, too.
So that's about it for free virtualization, I think... But it's been available for some time now.
Also, if you prefer Microsoft products, there's Microsoft Virtual Server 2005 R2 that's also free. I believe (not 100% positive) that Microsoft Virtual PC is also free now.
And there's also Bochs, that's free (open source, too, hosted over at SourceForge). And depending on your definition of virtualization, there's also VDMsound, that's a NT VM for old DOS-era games, too.
So that's about it for free virtualization, I think... But it's been available for some time now.
MS Virtual PC 2004 has been free for awhile now.
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