...A graphical user interface provides easy communication with Modbus RTU and TCP slaves, and a built-in bus monitor lets you examine all traffic on the bus.
QModMaster is based on libmodbus for protocol communication and QsLog for logging. It supports both Windows and Linux. For Windows, a pre-compiled binary is available — no installation required, just unzip and run.
The repository has moved to GitHub https://github.com/elbarbas/QModMaster>. SourceForge will continue to host updated binary releases, but the latest source code is maintained on GitHub.
Related project: pyModSlave http://sourceforge.net/projects/pymodslave — a Modbus slave for testing
Video demos: https://www.youtube.com/channel/UC3Tk2gE-KGtwOq8WWmb2R7g