WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
My Commander - My Commander (MyCO) is 'the smallest - smartest - fastest file manager in the world', for Windows. Small and smart, MyCO uses less of your computer's memory while it's running.
CoffeeCup Free FTP - The drag-and-drop FTP client that's as powerful as it is user friendly. Fast file transfers, intuitive work flow, and best of all, it's free! Download CoffeeCup Free FTP today.
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
BitKinex - Bitkinex is a multiprotocol FTP client, supporting FTP, SFTP, HTTP (WebDAV).