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.
Aftpd is an FTP server for anonymous access designed for Unix-like operating systems. It uses an asynchronous model of connection processing and provides service for all users within a single process; can use multiple threads to run more efficiently on multi-core systems, with each thread serving multiple clients simultaneously; uses effective mechanisms of transferring files, minimizing copying of data in RAM (sendfile or a combination of the system calls mmap/writev); uses effective event notification schemes (kqueue on FreeBSD and epoll on Linux); uses poll or select in older systems; and supports IPv6. For safety, it works as an unprivileged user and uses chroot.
BSDftpd-ssl is a secure and easy-to-use FTP server that supports industry standard TLS/SSL encryption and authentication for whole FTP sessions and data transfers. This implementation supports both the original FTP protocol and the RFC2228-compliant TLS/SSL enhancement. The package contains the secure FTP server (named "ftpd") and a command line TLS/SSL-aware FTP client (named "ftps"). The server's features include logging of transfers, changing of a session root (known as "chroot"), and virtual host support.
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.
Muddleftpd is an FTP server designed to overcome the need for working as root without limiting the access protection and safety of a regular FTP server. It can operate as a replacement for wu-ftpd, or it can operate under a single UID, running without any knowledge of the system password file. Anonymous access is available, and you can create as many guest accounts as you like with the same or different properties.