From BlueZone Software:
BlueZone Secure FTP is a free FTP client that offers security features necessary to encrypt and ensure data integrity. It allows a user to configure both the data and control ports, eliminating the need to open numerous ports on the firewall. Supports SSL/TLS, and SSH out of the box, so you can encrypt passwords and data. It's also the only FREE secure FTP client on the market that also includes special features designed specifically for mainframe and midrange file-sharing. Version 4.2 is Vista Certified.
What's new in this version:
Version 4.2 is Vista Certified.