MultiXTpm Application Server is FREE SOFTWARE, It is a Message Oriented Middleware (MOM) and Transaction Processing (TP) Monitor. It provides the runtime environment and rich API for developing large, scalable distributed applications for OLTP.
Log for auditing is part of business logic. For example, you want record the resources that a user visited. You know what to log at the development time. AuditLog is just for that. It is a plug-in of LimpidLog. See at http://www.acelet.com/auditlog/