Black Night is a communication and terminal emulation application. It fully supports AppleScript (including recording) and the Communications ToolBox.
The Connection Set is a free upgrade for registered Black Night users. It includes a Serial, Modem and Telnet Tool.
The File Transfer Set is a free upgrade for registered Black Night users. It includes an XMODEM, YMODEM, ZMODEM, ASCII, QuickB and Kermit Tool.
Scripting additions are plug in modules that extend the language of AppleScript.