FTP is the common abbreviation for "file transfer protocol". FTP agents are programs that allow the user to upload or download files to or from a server. There are a lot of good FTP programs available for download on the web, some commercial and some available at no cost to the user. One popular one that has two versions, one free and one not, is available from Ipswitch, Inc. Their free version is called WS FTP LE (light edition). They have a professional version and several other internet programs available also at the site.