An x86 virtualization software package developed by Sun Microsystems. Distributed under either the GNU GPL or a proprietary license with additional features.
Parallels virtual machine allows users to run multiple operating systems (Windows, Linux, FreeBSD, OS/2 etc.) in independent virtual machines on a single physical computer. Products, support, download.
Makers of Ubuntu Linux-based virtual appliances for VMware, XenServer, Microsoft Virtual PC/Virtual Server, and Virtual Iron. Products, partners, support, forum.