TopologiLinux is an easy-to-install Linux
distribution that is designed to be run on top of
or inside your Windows computer without requiring repartitioning. It can mount itself using a loop-back device or be run like a traditional distribution, and works with DOS, Windows 9x, or Windows 2000/XP systems with an NTFS or FAT partition. It is based on the latest version of Slackware and
contains some extra packages like OpenOffice.org, Wine, and much more.