A full featured & secured ftp server with many advanced functionalities such as SSL , 64-bit addressing , scripting interface and of course , full sets of FTP commands support , besides that , the performace is relatively high , anyone with 100m bit network can easily get 8000-1000k byte/sec transfer speed .

GuildFTPd
GuildFTPd has autobanning, an events manager, IRC support, plugin support, virtual file system, passive IP port selection to be used behind routers, buffer size control, remote administration via site commands, and much much more.

WinFtp Server
WinFtp Server is extremely simple and powerful FTP server to install and manage.It is a professional Windows FTP Server featuring speed, reliability and customization.

Ability FTP Server
Advanced, secure and easy to use FTP Server. Featuring remote admin, security protection options, disk quota limits, bandwidth restrictions, IP restrictions, virtual folders, resume support, real time activity viewer, real time control and much more.

RaidenFTPD
A full featured & secured ftp server with many advanced functionalities such as SSL , 64-bit addressing , scripting interface and of course , full sets of FTP commands support

Serv-U
Serv-U is a powerful, easy-to-use, award-winning FTP server. An FTP server uses the FTP protocol to share files across the Internet. Serv-U is not only 100% compliant with the current FTP standard, but also includes enhancements.