Based on Windows PE, LSoft Technologies' Active@ Boot Disk offers a well-chosen collection of utilities, including Image backup and recovery, a CD/DVD-based data backup program (Windows PE and Active@ load entirely into RAM, making the disc drive available for other uses), and a tool for recovering deleted partitions and files. You can change Windows passwords, wipe your hard drive, and choose between three partition managers. A Windows Explorer clone lets you copy files off of the hard drive.
You can even bring up Windows' Task Manager, although I'm not sure why you'd want to. And if you're feeling really geeky, there's even a HEX editor.