SafeTP is a transparent FTP Security Software that does not send passwords clear, like traditional ftp clients/servers.
SFT allows you to transfer files from computer to computer through the Internet.
(commercial) SFTPPlus offers secure file transfer to meet corporate and regulatory requirements - offering additional functionality to SFTP.
stftp ("simple" terminal FTP) is a small FTP client for the Unix console. It uses the curses library to present the remote directory as a navigable list, affording more ease of use than many other interactive clients.
TFTP is an implementation of a TFTP server and client developed on Linux. Qt was used for the UI of the TFTP client.
TLSWrap is a TLS/SSL FTP wrapper/proxy for UNIX and Windows, allowing you to use your favourite FTP client with any TLS/SSL-enabled FTP server.
Virtual Tunnel provides the method for creating Virtual Tunnels over TCP/IP networks and allows to shape, compress, encrypt traffic in that tunnels.
vvftp is a simple ftp client application written in C++. It is console based and can run on linux/solaris as of now. The design is simple and extensible. Adding a GUI should not be too much work.
Waiho is a simple FTP client for GNUstep, designed to be easy to use.
This project aims to develop a simple, easy to use and portable SFTP client. With simple we mean that the program will have only the main features needed. The structure consists of a two panel window, one for the local filesystem and another for the remote filesystem.
Xrmftp is a GPL'd FTP client for the X Window System.