Serv-U is the Industry's Most Popular File Server for Windows.
License: Shareware
OS Support: WinXP, Win2003, Win2000, Win Vista

Wing FTP Server is a professional cross-platform FTP Server featuring speed, reliability, user-friendly and customization .
License: Shareware
OS Support: WinXP, WinNT 4.x, WinNT 3.x, WinME, Win2003, Win2000, Win Vista, Win98, Win95

Titan FTP Server is a powerful secure multi-threaded File Transfer Server for Windows Features secure file transfers using SFTP, SSL, Virtual Folders, file & directory permissions, disk quotas, UL/DL ratios, bandwidth throttling.
License: Shareware
OS Support: WinXP, Win2003, Win2000, Win Vista

SSH2 Secure Shell Server and Secure FTP Server.
License: Shareware
OS Support: WinXP, WinME, Win Vista, Win98, Win95

Secure FTP Server and SSH2 Secure Shell Server with web based administration.
License: Shareware
OS Support: WinXP, WinME, Win Vista, Win98, Win95