MultiLoad is a load balancer that redirects HTTP requests to pre-defined servers/locations. It gives the provider a way to balance the traffic and hides the real download location. It allows you to manage different version of each download. It is also a load balancing server extension. You can distribute files on some servers so that a downloaded file can be loaded form different servers. These servers can have different priorities to control the active traffic.
tnftpd is a port of the NetBSD FTP server to other systems. It offers many enhancements over the traditional BSD ftpd, including per-class configuration directives via ftpd.conf(5), RFC 2389 and draft-ietf-ftpext-mlst-11 support, IPv6, transfer rate throttling, and more. tnftpd was formerly known as lukemftpd, and earlier versions are present in Mac OS X 10.2 (as ftpd) and FreeBSD 5.0 (as lukemftpd).
tnftp (formerly known as lukemftp) is a port of the NetBSD FTP client to other systems. It offers many enhancements over the traditional BSD FTP client, including command-line editing, command-line fetches of FTP and HTTP URLs (including via proxies), command-line uploads of FTP URLs, context-sensitive word completion, dynamic progress bar, IPv6 support, modification time preservation, paging of local and remote files, passive mode support (with fallback to active mode), SOCKS support, TIS FWTK gate-ftp server support, and transfer rate throttling. tnftp is the default FTP client found in FreeBSD, MacOS X, NetBSD, and SuSE Linux.
Fugu SSH is a Mac OS X graphical frontend to OpenSSH's Secure File Transfer application (SFTP). SFTP is similar to FTP, but, unlike FTP, the entire session is encrypted, meaning no passwords are sent in cleartext form, and it is thus much less vulnerable to third-party interception. Fugu allows you to take advantage of SFTP's security without having to sacrifice the ease of use found in a GUI. Fugu also includes support for SCP files transfers, and the ability to create secure tunnels through SSH.
fget is a commandline tool for mirroring remote files via FTP. It is based upon the included FTP client library, whose API is designed to resemble the normal Unix API for accessing files and directories. This interface should make it very easy to integrate FTP support into other applications.
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).