This is a program that makes FTP connections and transfers data for you. It's essentially the "go between" that has to exist between your computer and your server. There are many good free and paid FTP clients, as well as an FTP client integrated into Macromedia Dreamweaver (tm)
A software program that enables the user to upload and download files to and from an FTP site on the Internet using the File Transfer Protocol. Most current browsers have FTP client capabilities built into them.
A program you need to use FTP, FileZilla for instance. It is possible to log in on FTP servers and excange files.