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.
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.