This is small FTP client but it powerfull , 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. This program also support  for firewalls and proxy connections as well as SSL and Kerberos GSS security.

Features:

* Ability to resume Uploads/Downloads (if the server supports it)
* Custom Commands
* Site Manager with folders
* Keep Alive system
* Timeout detection
* Firewall support
* SOCKS4/5 and HTTP1.1 Proxy support
* SSL secured connections
* SFTP support
* Upload/Download Queue
* Drag&Drop
* Multi-language support
* GSS authentication and encryption using Kerberos

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