Open Virtuozzo is an Operating System-level server virtualization solution, built on Linux. Open Virtuozzo creates isolated, secure virtual private servers (VPSs) or virtual environments on a single physical server enabling better server utilization and ensuring that applications do not conflict. Each VPS performs and executes exactly like a stand-alone server; VPSs can be rebooted independently and have root access, users, IP addresses, memory, processes, files, applications, system libraries and configuration files.
The Open Virtuozzo project is an open source community project supported by SWsoft and is intended to provide access to the code and ultimately for the open source community to test, develop and further the OS virtualization effort. It is also a proving ground for new technology that may evolve into the regular Virtuozzo product offering. We encourage the community to access, use, develop and comment on the software and references on this site.
Open Virtuozzo is a subset of Virtuozzo — a commercial virtualization solution offered by SWsoft.
Since Virtuozzo (and Open Virtuozzo) approaches virtualization in a different way from VMware, Microsoft and Xen, I strongly recommend you to read SWsoft virtualization introduction before proceed.
You should also read how Open Virtuozzo differs from Virtuozzo in this comparison.
Then you can go further and try to download it at this location: http://openvirtuozzo.org/download
Expect to see a review of this product on virtualization.info in the near future.