Troll Tech FTP Daemon  
   For unix. The Troll FTP Daemon is a random hack, not a product.
   http://www.troll.no/freebies/ftpd.html

NcFTPd  
   Designed especially for high-traffic sites and internet service providers. [Unix]
   http://www.ncftp.com/ncftpd/

WSTPD  
   windows shareware
   http://www.wftpd.com/products.htm

BeroFTPD  
   un*x source (ftp site)
   ftp://linux.net.eu.org/pub/BeroFTPD/

Rumpus  
   FTP Server for Macintosh
   http://www.maxum.com/Rumpus/

WS_FTP Pro Server by Ipswitch, Inc.  
   WS_FTP Server is a full-featured FTP server for Windows NT systems that was designed to complement WS_FTP Pro - the world's most popular FTP client for Windows.
   http://www.ipswitch.com/products/ws_ftp/server/index.html

Vermillion FTP Daemon  
   An FTP Server with massive virtual link support. Platforms: Windows 95/NT.
   http://www.arcanesoft.com/

Infomentum: AppletFile  
   Compliant with RFC 1867, this Java-based tool adds file upload and download capabilities to Active Server Pages. Free trial version, documentation, FAQ, forum, support pages.
   http://www.infomentum.com/appletfile/

Winsock FTP Daemon  
   A basic FTP server with quite a bit of configuration options. Platforms: Window 3.x/95/NT.
   http://www.wftpd.com/

WuFTP  
   Washington University FTP server, the most public used Unix FTP Daemon.
   http://www.wu-ftpd.org/

Eserv FTP Server  
   Complete solution to access internet from LAN. Mail server (SMTP and POP3), news server (NNTP),web server and FTP server.
   http://www.etype.net/

RaidenFTPD  
   Supports server-to-server transfers and automatic IP rolling. News, shareware download, documentation, support forum. [Windows]
   http://playstation2.idv.tw/raidenftpd/

Setting Up wuftpd for Non-Anonymous Accounts  
   Walks through the process of setting up a Unix server in this configuration. By Glenn Fleishman. [Developer Shed]
   http://www.devshed.com/Server_Side/Administration/wuftpd/

Publicfile  
   Features, documentation, free download, and mailing list for this Unix tool.
   ftp://koobera.math.uic.edu/www/publicfile.html

Secure FTP Wrapper  
   Server-based package that enables an existing FTP server to become a Secure FTP server.
   http://ftpswrap.glub.com/

VisNetic FTPServer (FTP Serv-U earlier)  
   Secure FTP server software for Windows that includes advanced security technologies, and the most complete administrative features available in FTP servers.
   http://www.deerfield.com/products/visnetic_ftpserver/

War FTP Daemon  
   Highly configurable free FTP Daemon with security options. Platforms: Windows 9x and NT.
   http://www.jgaa.com/

Internet Access Manager  
   A dial-up connection manager includes FTP server. Free trial version, screenshot. By Software Folder Inc. [Windows]
   http://www.softfolder.com/internet_access_manager.html

BulletProof FTP Server  
   Full featured server for Windows.
   http://www.bpftpserver.com/

Gene6 FTP Server  
   Secure FTP server with SSL for Microsoft Windows 2000/XP/2003.
   http://www.g6ftpserver.com/

ProFTPD  
   Designed from the ground up for security, configurability and ease of administration.
   http://www.proftpd.org/

Broker  
   A FTP server for Windows. Web-based control and configure interface.
   http://ftp-broker.com/view_content.asp?ID=7