I’m probably the last KDE user to find out about this, but if you have access to an SSH server somewhere, open up Konqueror and type this in the address bar:
It’s just like managing files on a remote Samba share, only it’s done completely over SSH!
Unfortunately, fish:// only works from within KDE applications, but that’s where SSHFS (Secure SHell FileSystem) comes in. With this tool, you can easily mount any remote filesystem over SSH for access by all of your applications. Goodbye FTP!
Some people may be interested in WinSCP, which provides similar functionality on Windows.