From LikeMac Group:
Disk Order is an advanced double-panel file manager with built-in FTP client. It is good for everyone who need to perform a lot of file-work. Ideal for mac switchers who switched to Mac from PC. It was designed to an equivalent of famous Total Commander and Directory Opus in Mac OS X environment. It is useful not only for switchers but for notebooks owners too as it allows to perform most file operations with just keyboard.
The key feature of the application is that it allows you to do FTP upload/download, browse and extract files from archives, preview and edit files. All usual file operations are, of course, supported too