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.
PHPMQ is an Open Source serverless messaging toolkit for PHP, giving the PHP developer ability to perform JMS operations such as sending and receiving messages on queues and topics while ensuring delivery and enabling persistent messaging.