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.
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
AWS Transfer for SFTP - AWS Transfer for SFTP (AWS SFTP), is a fully managed service hosted in AWS that enables transfer of files over the Secure Shell (SSH) File Transfer Protocol directly in and out of Amazon S3.
FileZilla Server - Download FileZilla Server 0.9.60.2 for Windows
CompleteFTP by EnterpriseDT - CompleteFTP is a secure FTPS and SFTP server for Windows.
ProFTPD - The Official ProFTPD web site. ProFTPD is a high-performance, extremely configurable, and most of all a secure FTP server, featuring Apache-like configuration and blazing performance.