ForkLift is a robust and elegant file manager and FTP/SFTP client...
Simple Cocoa frontend to PureFTPd for Mac OS X.
Viper FTP (was ViaFTP) is a handy and powerful file manager for OS X, with a tremendous user interface that makes it effortless to use.
Transfer files using various connection protocols.
Create a secure connection between a home network and a VPN server.