CoDeSys 

Program PLCs matching the IEC 61131-3 standard and include C-routines as well as support for object-oriented programming. Runs multiple devices and multiple-applications environments for advanced programming. Customize the input and output to match the customer-specified configurations.

CoDeSys is a device-independent PLC-programming system. Matching the IEC 61131-3 standard it supports all standard programming languages but also allows including C-routines and supports object orientated programming. In combination with the CoDeSys SP runtime system it allows multi-device and multi-application programming. The component-based structure makes possible a customer-specific configuration and extension of the user interface.