scp for single files (bash autocompletion works on remote paths for me), sftp for a browse and rsync for large numbers of files. I don't really use regular old

scp for single files (bash autocompletion works on remote paths for me), sftp for a browse and rsync for large numbers of files. I don't really use regular old ftp, but if I need to then I usually just install the command-line ftp client, and uninstall it when I'm done.