VirtualBox

I've recently started using Sun's VirtualBox, the only professional-quality virtualization solution that is also Open Source Software. I've previously used VMWare Fusion (on Mac), VMWare Workstation (on Windows) & Microsoft VirtualPC (on Windows).

So my opinion on VirtualBox is that it is certainly worth taking a look at, particularly with the support of VMDK (VMWare) hard disks in the most recent 2.1 release. This has allowed me to take all my old VMWare images and access them using VirtualBox.

Performance appears to be much the same as VMWare, and the types of features I typically need are all included in VirtualBox.

So if you are looking for a simple to use, quick to setup, personal virtualization environment, I'd recommend you start with VirtualBox.

Stuart