FileZilla is a fast and reliable FTP client with lots of useful features and an intuitive interface. Main 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 There also is a server component available at the author's site.