SFTPGo - Fully featured and highly configurable SFTP server with optional HTTP/S, FTP/S and WebDAV support - S3, Google Cloud Storage, Azure Blob
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
FileZilla Server - Download FileZilla Server 0.9.60.2 for Windows
MobaSSH - Enhanced SSH server for Windows with Unix tools and much more
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Rebex Tiny SFTP Server - Rebex Tiny SFTP server is a small, minimalist, single-user SFTP server for Windows.