FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
GNOME Commander - GNOME Commander is a "two-pane" graphical file manager for the GNOME desktop environment.
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
xfdesktop - The xfdesktop application manages the desktop backdrop.
grsync - Grsync is a rsync gui, a graphical user interface for the rsync file synchronization and backup...
Rodent - Rodent is a project file manager for browsers; it helps you organize your work without saving files locally.