Existing users, 
Graybox Software offers the development tools for you to build and test your own OPC servers and clients. Our freeware utilities and OPC Toolkits makes it possible for anyone to develop reliable high-end OPC-compliant applications.
Graybox Software
Company Info
http://gray-box.net
79031237652
Technical and Customer Support Info
Technical Support:
http://gray-box.net/feedback.php
info@gray-box.net
Customer Support:
Developer: Update Info
