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.
SFTP To Go - Trusted by over 1,000 companies of all sizes, verticals and geographies, SFTP To Go is a fully managed, secure, and user-friendly cloud-based storage and sharing solution with SFTP/FTPS/S3/HTTP file access.
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
Progress WS_FTP - Progress WS_FTP is a robust FTP server solution that enables you to keep an eye on transfer details and security, accelerate file transfers, and protect your data with advanced settings and controls.