Q-Dir

Q-Dir (the Quad Explorer) is an innovative file manager for Windows that was built from the ground up to enable users to control their files in a true multitasking environment. With the ability to expand its interface from two panes to three or four, both professionals and novices can take full control over their storage drives, files, and directories.

You can point all panes to whatever location you wish (additionally, each pane can be configured to your wish), perform copying and moving of data with simple keyboard or mouse commands, chose specific color coding for extensions of your choice, and do everything you can do in traditional Windows Explorer.