zLogFabric is a cross-platform log solution which collects log messages via a message bus (jms, amqp) on a central server instance. The modular design enables the server to store and forward log messages as well as generating alarms and statistics. The system can log information from files, syslog, log4j, log4net and collect Windows eventlogs. The basic concepts have come from zyclonite networks. The .Net development happens here.