SAFMQ: Store and Forward Message Queue, message oriented middleware. Uses include Assured Async Messaging, SOA, Delayed/Batch, and Cluster/Grid Computing. The SAFMQ server provides cross platform communication among C++, PHP, Java, and .NET clients.
The Open1451 Project provides a repository for implementations, examples, and applications of the IEEE 1451 Standard for a Smart Transducer Interface for Sensors and Actuators.