SFTPPlus!

FileZilla Server, sister product to FileZilla Client, is an FTP server that supports FTP and FTP over SSL/TLS. FTP over SSL/TLS provides secure encrypted connections to the server.

Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.

ProFTPD is a high-performance, extremely configurable, and most of all a secure FTP server, featuring Apache-like configuration and blazing performance.

Pure-FTPd is a free (BSD), secure, production-quality and standard-conformant FTP server. It doesn't provide useless bells and whistles, but focuses on efficiency and ease of use. It provides simple answers to common needs, plus unique useful features for personal users as well as hosting providers.

Serv-U is the FTP server that is both secure and easy to use. Sharing files through the Internet is a smooth process with the industrys most popular FTP server. The clear and comprehensible interface makes easy work of all your file sharing and management, and the SSL connections between Serv-U and your secure FTP clients will ensure that your data is encrypted.

Syncplify.me Server! is the free FTP, FTPS, and SFTP server for Windows by Syncplify, Inc.Powerful, secure, yet very easy to configure, this software simplifies regulatory compliance and operation of a secure file transfer server.Its main features are: support for plain FTP, explicit FTPS (TLS), implicit FTPS (SSL/TLS), and SFTP file transfer protocols, basic secure shell (SSH-2) and forwarding tunnels support, runs as a system service, supports large files (> 4 GB).And it also has several useful advanced features like: PKI authentication with multiple key-pairs per user, advanced FTP(S) and SFTP security settings, configurable automatic blacklist, real-time monitor, virtual folders with per-folder security, IP-based and per-user security (white-lists), powerful event-handling subsystem, graphical Configuration Manager, command-line Interface (CLI) configuration tool.It is totally free, including lifetime updated and upgrades, for personal use. »

BPFTP Server is a powerful Windows FTP Server that's easy to install and manage. Total control over connected users and where your files go. All features available from an easy to use graphical interface! The most BulletProof way to distribute files.

A portable FTP server that allows definitions of several users with root directory and virtual directory, plus quite powerful control permissions.

Windows FTP Server with SFTP and SSL. Includes events automation. Recommended by Cisco for CUCM backup. Offers an optional Web Interface.

WS_FTP Server makes important data easily and securely accessible by setting up, managing, and protecting folders & files. With WS_FTP you can authenticate users from any ODBC-compliant user database, and set up virtual folders and multiple logical hosts on a single machine. WS_FTP Server is a highly secure, fully featured and easy-to-administer file transfer and data management server that delivers powerful admin control and leading security. WS_FTP Server protects your business critical and sensitive data with the highest commercially available data encryption level (256-bit). »

zFTPServer Suite is a user friendly and easy to use FTP server. It offers all the standard FTP features, as well as support for SSL/TLS, transfer limits, real-time monitoring, virtual directories, and user groups. You can also kick a selected user, monitor selected user activity, and set per-user restrictions for logins, transfer limits and speed limits. Additional features include statistics, support for passive connections and customizable logging. (Free for basic FTP server. Using SFTP and other advanced features requires purchase of a license) »

CrushFTP is a robust file transfer server that makes it easy to setup secure connections with your users.

Copssh is an ssh server and client implementation for windows systems. It is a yet another packaging of portable openssh, cygwin, some popular utilites, plus implementation of some best practices regarding security. You can use copssh for remote administration of your systems or gathering remote information in a secure way.

War FTP Daemon is a popular free FTP server, written by Jarle (jgaa) Aase in Norway.