muCommanderis a free alternative to well-known file manager Total Commander. There are plenty of such software (disk order, gnome commander, midnight commander …) each for an operating system or another. But one of the great advantages is that muCommander is cross-platform (Mac OS X, Windows, Linux, * BSD, Solaris …), you just need Java support.
It has all the features of our old friend: FTP, multilingual, browser, keyboard shortcut … but is lighter and faster than other program I’ve tried. The only noticeable difference I found is that the hotkeys are different but have an easy administration panel and a couple of minutes you can configure to your liking.
For lovers of Total Commander!