Virtualization smackdown: Sun xVM VirtualBox 1.6 vs. VMWare Server 2.0 Beta 2 | Between the Lines | ZDNet.com
: "xVM VirtualBox has the clear advantage of being the only free personal/SMB virtualization product that runs on all the major computing platforms - Windows, Linux, Mac, and Solaris. This is due to the fact that many of its components are written in a cross-platform GUI development library, Nokia/Trolltech’s Qt, which is best known for its use in the KDE Linux desktop and the Opera web browser. The interface is identical in all the environments and has a consistent look and feel, and all the virtual machines created in each platform independent version are compatible with each other. The software is also extremely light, weighing in at only a 22MB download."