Krusader is an advanced twin panel (commander style) file manager
for KDE and other desktops in the *nix world, similar to Midnight or
Total Commander. It provides all the file management features you
could possibly want.

Plus: extensive archive handling, mounted filesystem support, FTP,
advanced search module, an internal viewer/editor, directory
synchronisation, file content comparisons, powerful batch renaming
and much much more. It supports a wide variety of archive formats
and can handle other KIO slaves such as smb or fish.