LAN-Share - LAN Share is a cross platform local area network file transfer application, built using Qt GUI...
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
Forklift - The most advanced dual pane file manager and file transfer client for macOS.
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.
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
FileZilla Secure - A modified version of Filezilla dedicated to keeping your FTP passwords secure.