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...QModMaster is based on libmodbus <http://www.libmodbus.org/> for modbus communication and on QsLog <https://bitbucket.org/codeimproved/qslog> for logging. Supports both Windows and Linux.
For Windows a pre-compiled binary is availiable. It does not require instalation, just unzip and run.
You can download the latest stable version from here <https://sourceforge.net/projects/qmodmaster/files/qModMaster-Win32-exe-0.5.2-3.zip/download>.
Source code is availiable for Windows and Linux for compilation using Qt <http://www.qt.io/download>.
Check out my modbus slave project <http://sourceforge.net/projects/pymodslave/>.
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pyModSlave is a free python-based implementation of a ModBus slave application for simulation purposes. You can install the python module or use the precompiled (for Windows only) stand alone GUI (Qt based) utility (unzip and run). pyModSlave also includes a bus monitor for examining all traffic on the bus. You can also download it from pypi <https://pypi.org/project/pyModSlave/>.
pyModSlave is based on modbus-tk <http://code.google.com/p/modbus-tk/>, pySerial <https://github.com/pyserial/pyserial> and pyQt5 <http://www.riverbankcomputing.co.uk>.
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PL/SQL packages to perform Oracle 11g tasks within a very few number of lines : dump/load LOBs, compute CRC, get Mime Type from a BLOB, send XMPP messages, list directory contents as a table, interact with Twitter,deal with QrCodes, ...