Just TIBCO in the EAI space. Perhaps some of the JMS vendors, such as Progress.
Editor's note: I believe that Fiorano uses a hub-and-spoke architecture. For more information, visit http://www.fiorano.com/products/fmq_faq.htm#architecture
Visit TIBCO at http://www.tibco.com
Visit Progress Software at http://www.progress.com/
This was first published in August 2001