ftp-ssl is similar to the standard FTP client and it interoperates with normal ftpd, but it uses SSL authentication and encryption. It checks if the other side is also talking SSL, and if not it falls back to the normal FTP protocol. Advantages over normal FTP include encryption of passwords and transmitted data, preventing network sniffers from acquiring secret information (most notably passwords).
netstiff (formerly known as webdiff) is a powerful Web and FTP site update checker. It supports a variety of different methods (diff, HTML, size, date, MD5 sum, regexp) to check for updates. There are also sophisticated settings to make it useful for partly dynamic Web pages. Without any given arguments, netstiff will either run its interactive configuration tool or check your sites for updates and print the changes in a diff(1)-like manner.
Octod is a network controlled download manager supporting HTTP and FTP transfers. It is intended to run on desktop systems as a reliable and fast download manager without the overhead of a graphical user interface, but it can also be used as a centralized download station running in network environments with multiple users.
oftpd is designed to be as secure as an anonymous FTP server can possibly be. It runs as non-root for most of the time, and uses the Unix chroot() command to hide most of the systems directories from external users--they cannot change into them even if the server is totally compromised. It also contains its own directory-change and directory-listing code (most FTP servers execute the system "ls" command to list files).
sTeam provides a technical platform which allows groups of students, lecturers, and any other groups to construct and arrange their individual and cooperative learning and working space. It consists of an object-oriented server connected to a database, and Web, Java, and other (FTP, SMTP, IRC, etc.) clients. The server is event-driven and manages all user objects as well as the communication between the connected clients. Features that were different from most other cooperation tools is the self-organisation and self-administration by the members within the virtual environment.