Don’t know how long this one is going to last but you can get a free commercial version of Parallels Workstation. Check out the link below.
Parallels Workstation sells for $50 but you can request a licensed activation key for free using this Lunarpages offer. Key in your email address and they’ll immediately send you the download links for the trial version and serial number to convert the trial into a full retail version.
I just loves me some free software.