Here you find the latest news on the CODESYS development system from 3S-Smart Software Solutions GmbH:
CODESYS for Rasbery PI
Now you can even run you PLC program on the popular Rasbery PI platform. Available from the CODESYS website you can download the required software for EUR 50. A limited free demo version works for two hours.
http://store.codesys.com/codesys-control-for-raspberry-pi-sl.html
Have a look and enjoy the brave new PLC world. Looking forward to hear from your adventures and experiments with this new tool for (serious) Makers.