Web-FTP is a fully featured ftp client designed for secure file management.
Editor: Web-FTP 1.5.x introduces Crytpo Card support, and also some support for connecting to MS ftp servers. Crypto card support allows people to Connect to ftp servers that use crypto card security. Lemme know if it works for you.

Web-FTP is a fully featured ftp client designed for secure file management when used in conjunction with an SSL enabled web server. As a secondary function it can serve as an FTP client for users whos firewalls block FTP, since all communication is through the HTTP protocol.

Once you log in to Web-FTP it retains a session, which runs locally on your server, subsequent calls to the cgi (with the proper cookie) reconnect you to your session, therefore maintaining state. Since everything passes through a cgi, if you put that CGI on a secure web-server you will have secure ftp (as long as the ftp is the same machine as the HTTP Server, or is behind a firewall).

I recently ran across another another perl cgi to Access FTP called Drall. It seems to have a bit simpler interface. Just to let people know. you can free download Web-FTP 2.2.1 now.