IEC 60870-5-104 protocol tester.
Open source SCADA
Floor-level factory/shop automatization control software
Building automation (like KNX or OpenHAB) software (like CometVisu).
Emulate MODBUS industrial network with devices.
AMICI enables real-time execution of cyber-physical models (Simulink)
Open Source Hardware For Industrial Automation
openSCADA® is an open source SCADA system written in JAVA
The EPANET Real Time Extension
OPC UA communication stack written in python
ModBus for Mobile Platforms