What makes MuCommander stand out is that it is free, open source, and cross-platform. The author's web site provides downloads for Windows, Mac, and Linux (.tar.gz) as well as a Debian package, portable version, and a Java Web Start package.
MuCommander presents a skinnable, dual-pane view for file management. There's no tab support, though it doesn't consider that a major shortcoming - especially considering its other features are numerous, and extremely useful.
For starters, there's built-in support for FTP, SFTP, Samba, HTTP, NFS, and Bonjour. Several types of archives can be explored without extracting: zip, rar, tar, gzip, bzip2, iso, nrg, deb, and lst. MuCommander can create archives (press ctrl+I to pack) and even modify zip files on the fly without having to recompress the entire archive

There's also a command shell window with scrolling output, credential manager, and favorite locations list.

MuCommander is a fantastic file manager, and well worth a test drive for any user - regardless of OS.
MuCommander