VMware

• http://en.wikipedia.org/wiki/Comparison_of_virtual_machines
• http://www.vmware.com/download/server

Debian part:

aptitude install linux-headers-`uname -r` libx11-6 libx11-dev x-window-system-core xspecs libxtst6 psmisc build-essential

• http://www.howtoforge.com/debian_etch_vmware_server_howto