Eclipse 4diac the open source solution for industrial automation
Eclipse 4diac is an open source PLC environment allowing to implement industrial control solutions in a vendor neutral way. 4diac implements IEC 61499 extending IEC 61131-3 with improved support for controller to controller communication and dynamic reconfiguration. With that 4diac provides the infrastructure for Industrie 4.0 and industrial IoT.
Further information and the latest versions can be found here: https://eclipse.dev/4diac/
Petri-LLD is a graphical development environment for real-time automation control and is written in Java. It is based on a form of Petri net, and compiles to a number of programmable logic controller (PLC) languages as well as Java and Visual Basic.
This project aims to create a testing environment for S7-PLC (programmable logic controller) software. It is based on the Eclipse platform and can test S7 instruction list code exported from the Siemens Step7 software.