Advanced Serial Port Terminal allows you to send data blocks or whole files down the serial line or redirect everything you receive from the communication port into a file ("Terminal" menu). You may use it for debugging and logging purposes or simply connect two computers using null-modem cable.
"Send ASCII File" and "Send via X-modem" options open file selection dialogs to send ASCII file or any file correspondingly.
"Receive ASCII File" and "Receive via X-modem" options open "save as" dialog to save incoming data into a file.