WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
FTP Wanderer - Programming, source code, downloads, MFC, ATL, COM, popup killer, ftp server, ftp client, wysiwyg web builder, asp server,
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.
Forklift - The most advanced dual pane file manager and file transfer client for macOS.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
FTP Rush - FTP Rush is the most powerful and free FTP/FXP/SFTP/TFTP client sofware for Windows.