NcFTPd is a high-performance File Transfer Protocol (FTP) server software solution for UNIX systems, designed especially for high-traffic sites and internet service providers.
It is also popular among students, home users, educational sites, and businesses. NcFTPd has been providing fast, flexible, secure, and commercially supported FTP service since 1996.
30 day free evaluation copy for Linux/x86 (Kernel versions 2.4/2.6; GNU Libc versions 2.2+).