Whats the advantage of using NEsper over other products?
NEsper can easily be embedded in any CLR-based product. Events in NEsper can be represented as plain objects eliminating the need to format, feed and receive events into a separate possibly remote engine process. NEsper is an entirely free open-source component available under the GNU GPL license. The open-source nature of NEsper helps in tailoring the event processing language and other community driven features.