The TIBCO StreamBase® platform is a high-performance system for rapidly building applications that analyze and act on real-time streaming data. Using StreamBase, users can rapidly build real-time systems and deploy them at a fraction of the cost and risk of other alternatives.
TIBCO BusinessEvents® allows organizations to quickly build event-driven rules systems that intelligently process streams of events at the speed they are generated - supporting realtime decision making, automation, and proactive responses.
Red Hat Decision Manager (formerly JBoss BRMS) is a business rules management and CEP option.
WSO2 in Mountain View, California offers their WSO2 Complex Event Processor (CEP).
Microsoft's StreamInsight is the company's complex event processing (CEP) platform.
Esper is an open source complex event processing (CEP) platform supported by EsperTech in New Jersey.