Every so often I need the ability to transfer files directly from one server to another. Now this could be done by using a standard ftp program like filezilla and first copying it from a remote computer to the local computer and then again copying it back to another remote computer. Although, sometimes it is nice to go the more direct route and use a program that supports fxp which allows connecting to 2 remote servers and transfering directly from one to the other. Wikipedia has a nice list of programs that support this.