On Macs, I use Cyberduck (www.cyberduck.ch); I found it to be even more reliable than Filezilla and it also works better with SFTP than Filezilla.
Other than that, try Python and its 'included batteries'. ;-) Mark Lutz's "Programming Python" comes with great sample code.
Other than that, try Python and its 'included batteries'. ;-) Mark Lutz's "Programming Python" comes with great sample code.