Robust FTP/FTP-TLS/SFTP browser for the Mac whose lack of visual clutter and cleverly intuitive features make it easy to use.
ForkLift is a robust and elegant file manager and FTP/SFTP client...
FTP + SFTP + FTPS file transfer client which focuses on speed...
ExpanDrive builds cloud storage in every application, acts just like a USB drive plugged into your Mac.
FTCL is a platform-independent utility for scripting file transfers.