SerLooK is a KDE application for inspecting data going over serial lines. It can work as a binary terminal that sends and receives data through a defined port (Point to Point mode) and displays them on separate views. Each view can be configured to display data in hexadecimal, decimal, octal, binary, and raw ASCII. It is also possible to perform I/O through terminal emulation views and define a secondary port and monitor the traffic between two external hosts using a "Y" cable (Snooper mode).
STermPro is a powerful program for serial port monitoring and control with protocols. STermPro lets you control a serial device with parameters, not bytes. An auto-answer feature helps with debugging and emulating external devices. Sending and receiving us supported simultaneously on many serial ports. Mixed strings with hex characters can be sent. Clearly arranged messages can be analyzed using the unique serial port flow visualization method. Custom serial devices and baud rates are supported.