Free Commander

"FreeCommander is an easy-to-use alternative to the standard windows file manager. The program helps you with daily work in Windows. Here you can find all the necessary functions to manage your data stock. You can take FreeCommander anywhere - just copy the installation directory on a CD, USB-Stick or even a floppy disk - and you can even work with this program on a foreign computer."

http://freecommander.com/