FileZilla is powerful Open Source FTP client with many features. It has many features, such as a site manager to store all your connection details and logins as well as an Explorer style interface that display the local and remote folders and can be customized independently. Filezilla also offers support for firewalls and proxy connections as well as SSL and Kerberos GSS security. Additional features include keep alive, auto ascii/binary transfer, download queue, manual transfers, raw FTP commands and more.