The above open source projects are good choices if you have basic
requirements. If you need more features for your interop project, try
J-Integra as well.
http://j-integra.intrinsyc.com/
Regards,
Shane Sauer
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J-Integra Interoperability Solutions
http://j-integra.intrinsyc.com/
high performance interop middleware for java, corba, com & .net