TwoOStwo virtual machine for Windows NT/2000/XP enables running multiple operating systems (OS/2, Red Hat 6 and
WinNT) and its applications simultaneously with the primary Windows NT/2000/XP operating system on a single PC.Trial version of the twoOStwoTM for Windows NT/2000/XP can be downloaded from here (free registration key required). Support for non-OS/2 guest operating systems is limited. Also there are no network support.
You can download twoOStwo TM for Windows NT/2000/XP version 2.1 Release Candidate 1 from here.