AFD is a program to automatically distribute files either locally or to remote hosts. The files are distributed by using FTP or SMTP, and can be sent in parallel and with priority. It provides a GUI to monitor and control the distribution and extensive logging of all activities.
BetaFTPD is a single-threaded FTP daemon. The single-threadedness makes it faster than most other FTP daemons (contrary to common belief), and makes it extremely light on memory. Although it lacks a few functions (which you probably won't miss), the current version is very small and has a decent amount of functionality. BetaFTPD is built on the concept of heavy code reuse, which should hopefully make it easier for other programmers to contribute.
bftpd is a very configurable Linux FTP server which can do chroot without special configuration or directory preparation. It will work out-of-the-box with almost no configuration required, and works on all Unix variants tested. Most FTP commands are supported, and user authentication is done via passwd/shadow or PAM. tar/gzip on-the-fly is supported.
DBOX is a free communication package for ISPs. It supports a large number of message formats such as RFC/UUCP, ZConnect, Janus/Janus2, Alphabox, and GSbox. It is designed for large installations and includes a WWW package with an email/HTML gateway, an HTML online shop, support for POP3/IMAP4, and personal homepages with HTTP/FTP upload.
The ECLiPt Mirroring Tool is a full featured FTP mirror script written in Python. It supports nice config files, many features for controlling the mirror (include, exclude of files, special watermarks for deleting files, download just the latest version of some program), as well as producing nice HTML output.
EFTP is a backwards-compatible server and client which implement an extension to the FTP protocol. The extension provides protocol-level support for directory recursion and compression over a persistent connection. As would be expected, for the extension to be used, the extended client must be connecting to an extended server.