[any ANONYMOUS forum user]

I need free virtualization applications. Please mentiond applications for all platforms including Windows, Mac OS X, Linux.

I know that Microsoft Virtual PC is free, but it doesn't work with many Windows OSes.

I like solutions from Parallels and I got a free license for Parallels Workstation from them, but they don't seem to have any free offers anymore.

VMWare seems to be commercial only.

I've heard that VirtualBox is free, but haven't tried that.