Found this little tidbit about the WS_FTP Professional secure file transfer client on the Legalalan blog:
“Ipswitch WS_FTP Professional is the leading FTP client program with millions of users worldwide. You can easily and securely transfer files between your home and office, and to and from customers, clients, or vendors. Its features include security (SSL, SSH, and PGP) and advanced file management–everything you would expect from an FTP client.
Ipswitch WS_FTP Professional 2007 features increased security and transfer options that provide up to 256-bit encryption, HTTP and HTTPS transfers, and WS_FTP’s new compression mode. Additional information about the changes in this version can be found here.“