Below you will find links to bootable rescue CDs. I will add more as I come across them.
Ubuntu Rescue Remix – This media can be used on a CD or a USB drive. It has several tool that you can used to play doctor on your system with. Here are a few that are among those tools: dosfstools, ntfsprogs, Autopsy, Testdisk, & Parted.
Trinity Rescue Kit – This media can be used on a CD, USB drive, or booted with PXE. It is used to aid in recovering Microsoft Windows based PCs. I have personally used this rescue kit before to reset that password of the administrator’s account to gain access to older installs of Windows.