mimic is a server that mimics Internet servers. It includes imitators for ftpd and telnetd, and can be extended with scripting to support other types of imitation. Users will believe they are connected to authentic services (such as ftpd or telnetd) but will never be able to log in. Everything that they type is logged. In addition, scripting new imitator services is simple. The program includes a one-liner example of a fully-functional echo server. The project's goal is to create a script for imitating most, if not all, popular Internet services.
PHP FTP Client is an FTP client that is useful for allowing people behind a firewall access to FTP without opening the FTP ports inside the firewall. It could be used as a front end to a local FTP server, and therefore allow the administrator to provide access to the FTP server only from localhost.
Junkie is a GTK FTP client. It features support for both IPv6 and IPv4, multiple site connections, a queue for files/directories, a site manager which supports encryption, quick connections, downloading/uploading of whole directories without using the queue, optional caching of directories, editing/viewing of files on the fly, support for playing MP3s (using libjamp), Oggs, XMs, MODs, and more, sound playlist support, and a preferences configuration system.
Twoftpd is an FTP server that strives to be secure, simple, and efficient. None of the commands can cause execution of other programs, and the normal model of execution does a chroot to the logged in user's directory immediately after authentication. The name "twoftpd" comes from the fact that there are two parts to the server: an authenticating front end, which contains no file or data transfer code, and one of two back ends, which contain all the data transfer code.
NotFTP is a fully-featured and easy-to-use Web-based HTTP-FTP gateway written in PHP. It supports all common FTP functions and allows the administrator to set a maximum transfer size and a daily transfer quota for users. It is particularly well-suited for making FTP accessible to users behind an HTTP-only proxy.