FileZilla is designed as a small but powerful FTP client with many features.

FileZilla includes a site manager to store all your connection details and logins as well as an Explorer style interface that shows the local and remote folders and can be customized independently.

FileZilla offers support for firewalls and proxy connections as well as SSL and Kerberos GSS security.

Additional features include keep alive, auto ascii/binary transfer and more. A nice program for beginners and advanced user alike.