OPC Simulator Server.
Gray Simulator is an OPC Server that can be usefull in OPC Client applications debugging.

Gray Simulator provides any OPC Client application with simulated COM and DCOM based communications. Use the Simulator to test compliance of any OPC Data Access compatible HMI, SCADA or custom application.

Gray Simulator tags tree includes

* harmonic waves;
* TRIANGLE waves;
* square waves;
* ramps;
* random numbers and logical values;
* random strings;
* random dates;
* enumerations;
* storage registers of different types. you can free download Gray Simulator 1.8 now.