SpeedLinux is a customized coLinux. coLinux is not a VM but it can be used in the same way. Installation of Speedlinux results in a complete LINUX System with X server running side on side with Windows on a single PC.
Beginning with Version 3001, Speedlinux comes now with the Ubuntu 12.04 LTS Precise Pangolin Developer (Alpha devel) for download via installer. Downloading one of the different compressed Ubuntu versions ( 9,04, 11.10 or 12.04 ) is optional. Updating is easy. https://wiki.ubuntu.com/PrecisePangolin/ReleaseSchedule
Speedlinux also installs Xming and PuTTY
Only SVN download contain: * Speed-to-fritz Script. * Script to start Freetz. * The Script to build installer.
Downloadlink for images: http://sourceforge.net/projects/speedlinux/
Attention! Usable only on Windows Systems with XP/Vista/7 32bit
More details are fond on the project homepage.