FileZilla Server - Download FileZilla Server 0.9.60.2 for Windows
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
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.
Rebex Tiny SFTP Server - Rebex Tiny SFTP server is a small, minimalist, single-user SFTP server for Windows.
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
SFTPGo - Fully featured and highly configurable SFTP server with optional HTTP/S, FTP/S and WebDAV support - S3, Google Cloud Storage, Azure Blob